39872428 has 12 divisors (see below), whose sum is σ = 70279720. Its totient is φ = 19792512.

The previous prime is 39872423. The next prime is 39872461. The reversal of 39872428 is 82427893.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (39872423) 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, 35301 + ... + 36412.

Almost surely, 2^39872428 is an apocalyptic number.

It is an amenable number.

39872428 is a deficient number, since it is larger than the sum of its proper divisors (30407292).

39872428 is a wasteful number, since it uses less digits than its factorization.

39872428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71856 (or 71854 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 39872428 is about 6314.4618139632. The cubic root of 39872428 is about 341.6312270466.

The spelling of 39872428 in words is "thirty-nine million, eight hundred seventy-two thousand, four hundred twenty-eight".