1538972508 has 24 divisors (see below), whose sum is σ = 3601600912. Its totient is φ = 511467264.

The previous prime is 1538972489. The next prime is 1538972531. The reversal of 1538972508 is 8052798351.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186235 + ... + 194322.

Almost surely, 2^1538972508 is an apocalyptic number.

It is an amenable number.

1538972508 is an abundant number, since it is smaller than the sum of its proper divisors (2062628404).

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

1538972508 is a wasteful number, since it uses less digits than its factorization.

1538972508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380901 (or 380899 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 1538972508 is about 39229.7400960037. The cubic root of 1538972508 is about 1154.5434645537.

The spelling of 1538972508 in words is "one billion, five hundred thirty-eight million, nine hundred seventy-two thousand, five hundred eight".