15381872 has 80 divisors (see below), whose sum is σ = 35435232. Its totient is φ = 6389760.

The previous prime is 15381857. The next prime is 15381881. The reversal of 15381872 is 27818351.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 158528 + ... + 158624.

Almost surely, 2^15381872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15381872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17717616).

15381872 is an abundant number, since it is smaller than the sum of its proper divisors (20053360).

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

15381872 is a wasteful number, since it uses less digits than its factorization.

15381872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 180 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 15381872 is about 3921.9729728798. The cubic root of 15381872 is about 248.6965330402.

The spelling of 15381872 in words is "fifteen million, three hundred eighty-one thousand, eight hundred seventy-two".