127638872 has 16 divisors (see below), whose sum is σ = 239686560. Its totient is φ = 63722464.

The previous prime is 127638871. The next prime is 127638877. The reversal of 127638872 is 278836721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127638871) 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, 6368 + ... + 17199.

It is an arithmetic number, because the mean of its divisors is an integer number (14980410).

Almost surely, 2^127638872 is an apocalyptic number.

It is an amenable number.

127638872 is a deficient number, since it is larger than the sum of its proper divisors (112047688).

127638872 is a wasteful number, since it uses less digits than its factorization.

127638872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24250 (or 24246 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 127638872 is about 11297.7374726093. The cubic root of 127638872 is about 503.4940227360.

The spelling of 127638872 in words is "one hundred twenty-seven million, six hundred thirty-eight thousand, eight hundred seventy-two".