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130438428 = 223231972399
BaseRepresentation
bin1111100011001…
…01010100011100
3100002102221212220
413301211110130
5231343012203
620535425340
73142464651
oct761452434
9302387786
10130438428
11676a135a
1237825250
1321040203
1413475c28
15b6b8653
hex7c6551c

130438428 has 48 divisors (see below), whose sum is σ = 319334400. Its totient is φ = 41360704.

The previous prime is 130438423. The next prime is 130438453. The reversal of 130438428 is 824834031.

It is a super-2 number, since 2×1304384282 = 34028366998222368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130438423) 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, 53173 + ... + 55571.

It is an arithmetic number, because the mean of its divisors is an integer number (6652800).

Almost surely, 2130438428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 130438428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159667200).

130438428 is an abundant number, since it is smaller than the sum of its proper divisors (188895972).

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

130438428 is a wasteful number, since it uses less digits than its factorization.

130438428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 130438428 is about 11420.9644076146. The cubic root of 130438428 is about 507.1485468193.

The spelling of 130438428 in words is "one hundred thirty million, four hundred thirty-eight thousand, four hundred twenty-eight".

Divisors: 1 2 3 4 6 12 23 46 69 92 138 197 276 394 591 788 1182 2364 2399 4531 4798 7197 9062 9596 13593 14394 18124 27186 28788 54372 55177 110354 165531 220708 331062 472603 662124 945206 1417809 1890412 2835618 5671236 10869869 21739738 32609607 43479476 65219214 130438428