15995240 has 32 divisors (see below), whose sum is σ = 37233000. Its totient is φ = 6177024.

The previous prime is 15995227. The next prime is 15995251. The reversal of 15995240 is 4259951.

It can be written as a sum of positive squares in 4 ways, for example, as 15665764 + 329476 = 3958^2 + 574^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15995240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5735 + ... + 8054.

Almost surely, 2^15995240 is an apocalyptic number.

15995240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15995240 is an abundant number, since it is smaller than the sum of its proper divisors (21237760).

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

15995240 is a wasteful number, since it uses less digits than its factorization.

15995240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13829 (or 13825 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 15995240 is about 3999.4049557403. The cubic root of 15995240 is about 251.9592190664.

The spelling of 15995240 in words is "fifteen million, nine hundred ninety-five thousand, two hundred forty".