39728375 has 8 divisors (see below), whose sum is σ = 49581168. Its totient is φ = 31782600.

The previous prime is 39728363. The next prime is 39728393. The reversal of 39728375 is 57382793.

It is not a de Polignac number, because 39728375 - 2²⁰ = 38679799 is a prime.

It is a Duffinian number.

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, 158789 + ... + 159038.

It is an arithmetic number, because the mean of its divisors is an integer number (6197646).

Almost surely, 2^39728375 is an apocalyptic number.

39728375 is a deficient number, since it is larger than the sum of its proper divisors (9852793).

39728375 is an equidigital number, since it uses as much as digits as its factorization.

39728375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317842 (or 317832 counting only the distinct ones).

The product of its digits is 317520, while the sum is 44.

The square root of 39728375 is about 6303.0448990944. The cubic root of 39728375 is about 341.2193100802.

The spelling of 39728375 in words is "thirty-nine million, seven hundred twenty-eight thousand, three hundred seventy-five".