15795840 has 128 divisors (see below), whose sum is σ = 53121600. Its totient is φ = 3981312.

The previous prime is 15795803. The next prime is 15795851. The reversal of 15795840 is 4859751.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×15795840² = 499017122611200, which contains 22 as substring.

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, 36264 + ... + 36696.

Almost surely, 2^15795840 is an apocalyptic number.

15795840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15795840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26560800).

15795840 is an abundant number, since it is smaller than the sum of its proper divisors (37325760).

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

15795840 is a wasteful number, since it uses less digits than its factorization.

15795840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 15795840 is about 3974.3980676324. The cubic root of 15795840 is about 250.9078459391.

The spelling of 15795840 in words is "fifteen million, seven hundred ninety-five thousand, eight hundred forty".