15138372 has 12 divisors (see below), whose sum is σ = 35322896. Its totient is φ = 5046120.

The previous prime is 15138359. The next prime is 15138391. The reversal of 15138372 is 27383151.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630754 + ... + 630777.

Almost surely, 2^15138372 is an apocalyptic number.

15138372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15138372 is an abundant number, since it is smaller than the sum of its proper divisors (20184524).

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

15138372 is a wasteful number, since it uses less digits than its factorization.

15138372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261538 (or 1261536 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 15138372 is about 3890.8060861472. The cubic root of 15138372 is about 247.3772312255.

The spelling of 15138372 in words is "fifteen million, one hundred thirty-eight thousand, three hundred seventy-two".