15796640 has 24 divisors (see below), whose sum is σ = 37319940. Its totient is φ = 6318592.

The previous prime is 15796633. The next prime is 15796661. The reversal of 15796640 is 4669751.

It can be written as a sum of positive squares in 2 ways, for example, as 15272464 + 524176 = 3908^2 + 724^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15796594 and 15796603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49205 + ... + 49524.

Almost surely, 2^15796640 is an apocalyptic number.

15796640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15796640 is an abundant number, since it is smaller than the sum of its proper divisors (21523300).

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

15796640 is an equidigital number, since it uses as much as digits as its factorization.

15796640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98744 (or 98736 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 15796640 is about 3974.4987105294. The cubic root of 15796640 is about 250.9120817144.

The spelling of 15796640 in words is "fifteen million, seven hundred ninety-six thousand, six hundred forty".