15797940 has 48 divisors (see below), whose sum is σ = 44452800. Its totient is φ = 4192000.

The previous prime is 15797939. The next prime is 15797983. The reversal of 15797940 is 4979751.

It is a happy number.

15797940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15797892 and 15797901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14536 + ... + 15584.

It is an arithmetic number, because the mean of its divisors is an integer number (926100).

Almost surely, 2^15797940 is an apocalyptic number.

15797940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15797940 is an abundant number, since it is smaller than the sum of its proper divisors (28654860).

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

15797940 is a wasteful number, since it uses less digits than its factorization.

15797940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 15797940 is about 3974.6622498019. The cubic root of 15797940 is about 250.9189645443.

The spelling of 15797940 in words is "fifteen million, seven hundred ninety-seven thousand, nine hundred forty".