15797800 has 24 divisors (see below), whose sum is σ = 36730350. Its totient is φ = 6319040.

The previous prime is 15797773. The next prime is 15797807. The reversal of 15797800 is 879751.

It can be written as a sum of positive squares in 3 ways, for example, as 13942756 + 1855044 = 3734^2 + 1362^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15797800.

It is not an unprimeable number, because it can be changed into a prime (15797807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39295 + ... + 39694.

Almost surely, 2^15797800 is an apocalyptic number.

15797800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15797800 is an abundant number, since it is smaller than the sum of its proper divisors (20932550).

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

15797800 is a wasteful number, since it uses less digits than its factorization.

15797800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79005 (or 78996 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 15797800 is about 3974.6446382035. The cubic root of 15797800 is about 250.9182233346.

The spelling of 15797800 in words is "fifteen million, seven hundred ninety-seven thousand, eight hundred".