15140388 has 12 divisors (see below), whose sum is σ = 35327600. Its totient is φ = 5046792.

The previous prime is 15140381. The next prime is 15140449. The reversal of 15140388 is 88304151.

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

It is not an unprimeable number, because it can be changed into a prime (15140381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630838 + ... + 630861.

Almost surely, 2^15140388 is an apocalyptic number.

It is an amenable number.

15140388 is an abundant number, since it is smaller than the sum of its proper divisors (20187212).

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

15140388 is a wasteful number, since it uses less digits than its factorization.

15140388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261706 (or 1261704 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 15140388 is about 3891.0651498015. The cubic root of 15140388 is about 247.3882119386.

The spelling of 15140388 in words is "fifteen million, one hundred forty thousand, three hundred eighty-eight".