15855144 has 32 divisors (see below), whose sum is σ = 39795840. Its totient is φ = 5264000.

The previous prime is 15855131. The next prime is 15855157. The reversal of 15855144 is 44155851.

It is an interprime number because it is at equal distance from previous prime (15855131) and next prime (15855157).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5569 + ... + 7919.

It is an arithmetic number, because the mean of its divisors is an integer number (1243620).

Almost surely, 2^15855144 is an apocalyptic number.

It is an amenable number.

15855144 is an abundant number, since it is smaller than the sum of its proper divisors (23940696).

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

15855144 is a wasteful number, since it uses less digits than its factorization.

15855144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641 (or 2637 counting only the distinct ones).

The product of its digits is 16000, while the sum is 33.

The square root of 15855144 is about 3981.8518304929. The cubic root of 15855144 is about 251.2214571174.

The spelling of 15855144 in words is "fifteen million, eight hundred fifty-five thousand, one hundred forty-four".