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1025305040 = 245234113591
BaseRepresentation
bin111101000111001…
…110100111010000
32122110021220002202
4331013032213100
54044434230130
6245423502332
734256643344
oct7507164720
92573256082
101025305040
11486837941
122474579a8
1313455a196
149a257624
156002e145
hex3d1ce9d0

1025305040 has 80 divisors (see below), whose sum is σ = 2548336896. Its totient is φ = 382694400.

The previous prime is 1025305031. The next prime is 1025305049. The reversal of 1025305040 is 405035201.

It is an interprime number because it is at equal distance from previous prime (1025305031) and next prime (1025305049).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025305049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68645 + ... + 82235.

Almost surely, 21025305040 is an apocalyptic number.

1025305040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1025305040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1274168448).

1025305040 is an abundant number, since it is smaller than the sum of its proper divisors (1523031856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1025305040 is a wasteful number, since it uses less digits than its factorization.

1025305040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13668 (or 13662 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1025305040 is about 32020.3847572136. The cubic root of 1025305040 is about 1008.3648475606.

The spelling of 1025305040 in words is "one billion, twenty-five million, three hundred five thousand, forty".

Divisors: 1 2 4 5 8 10 16 20 23 40 41 46 80 82 92 115 164 184 205 230 328 368 410 460 656 820 920 943 1640 1840 1886 3280 3772 4715 7544 9430 13591 15088 18860 27182 37720 54364 67955 75440 108728 135910 217456 271820 312593 543640 557231 625186 1087280 1114462 1250372 1562965 2228924 2500744 2786155 3125930 4457848 5001488 5572310 6251860 8915696 11144620 12503720 12816313 22289240 25007440 25632626 44578480 51265252 64081565 102530504 128163130 205061008 256326260 512652520 1025305040