39381937 has 12 divisors (see below), whose sum is σ = 46879536. Its totient is φ = 32969160.

The previous prime is 39381931. The next prime is 39381959. The reversal of 39381937 is 73918393.

It is a de Polignac number, because none of the positive numbers 2^k-39381937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39381893 and 39381902.

It is not an unprimeable number, because it can be changed into a prime (39381931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7239 + ... + 11452.

It is an arithmetic number, because the mean of its divisors is an integer number (3906628).

Almost surely, 2^39381937 is an apocalyptic number.

It is an amenable number.

39381937 is a deficient number, since it is larger than the sum of its proper divisors (7497599).

39381937 is a wasteful number, since it uses less digits than its factorization.

39381937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18748 (or 18741 counting only the distinct ones).

The product of its digits is 122472, while the sum is 43.

The square root of 39381937 is about 6275.5029280529. The cubic root of 39381937 is about 340.2245834550.

The spelling of 39381937 in words is "thirty-nine million, three hundred eighty-one thousand, nine hundred thirty-seven".