15039940 has 12 divisors (see below), whose sum is σ = 31583916. Its totient is φ = 6015968.

The previous prime is 15039931. The next prime is 15039943. The reversal of 15039940 is 4993051.

It can be written as a sum of positive squares in 2 ways, for example, as 7064964 + 7974976 = 2658^2 + 2824^2 .

It is not an unprimeable number, because it can be changed into a prime (15039943) 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, 375979 + ... + 376018.

It is an arithmetic number, because the mean of its divisors is an integer number (2631993).

Almost surely, 2^15039940 is an apocalyptic number.

15039940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15039940 is an abundant number, since it is smaller than the sum of its proper divisors (16543976).

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

15039940 is a wasteful number, since it uses less digits than its factorization.

15039940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752006 (or 752004 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 15039940 is about 3878.1361502660. The cubic root of 15039940 is about 246.8399034656.

The spelling of 15039940 in words is "fifteen million, thirty-nine thousand, nine hundred forty".