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1320220240 = 24523717511
BaseRepresentation
bin100111010110000…
…1111011001010000
310102000020010200221
41032230033121100
510200434021430
6335000522424
744500454413
oct11654173120
93360203627
101320220240
11618259009
1230a180414
13180697711
14c74a5b7a
157ad8657a
hex4eb0f650

1320220240 has 40 divisors (see below), whose sum is σ = 3202973568. Its totient is φ = 505127040.

The previous prime is 1320220229. The next prime is 1320220241. The reversal of 1320220240 is 420220231.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320220241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356916 + ... + 360595.

Almost surely, 21320220240 is an apocalyptic number.

1320220240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320220240 is an abundant number, since it is smaller than the sum of its proper divisors (1882753328).

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

1320220240 is a wasteful number, since it uses less digits than its factorization.

1320220240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717547 (or 717541 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1320220240 is about 36334.8350759983. The cubic root of 1320220240 is about 1097.0223158713.

Adding to 1320220240 its reverse (420220231), we get a palindrome (1740440471).

Subtracting from 1320220240 its reverse (420220231), we obtain a palindrome (900000009).

The spelling of 1320220240 in words is "one billion, three hundred twenty million, two hundred twenty thousand, two hundred forty".

Divisors: 1 2 4 5 8 10 16 20 23 40 46 80 92 115 184 230 368 460 920 1840 717511 1435022 2870044 3587555 5740088 7175110 11480176 14350220 16502753 28700440 33005506 57400880 66011012 82513765 132022024 165027530 264044048 330055060 660110120 1320220240