172138948 has 24 divisors (see below), whose sum is σ = 310049600. Its totient is φ = 83563488.

The previous prime is 172138937. The next prime is 172138987. The reversal of 172138948 is 849831271.

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, 90673 + ... + 92551.

Almost surely, 2^172138948 is an apocalyptic number.

It is an amenable number.

172138948 is a deficient number, since it is larger than the sum of its proper divisors (137910652).

172138948 is a wasteful number, since it uses less digits than its factorization.

172138948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539 (or 2537 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 172138948 is about 13120.1733220259. The cubic root of 172138948 is about 556.2794904535.

The spelling of 172138948 in words is "one hundred seventy-two million, one hundred thirty-eight thousand, nine hundred forty-eight".