31938345 has 12 divisors (see below), whose sum is σ = 55359876. Its totient is φ = 17033760.

The previous prime is 31938337. The next prime is 31938371. The reversal of 31938345 is 54383913.

It can be written as a sum of positive squares in 2 ways, for example, as 20466576 + 11471769 = 4524^2 + 3387^2 .

It is not a de Polignac number, because 31938345 - 2³ = 31938337 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354826 + ... + 354915.

It is an arithmetic number, because the mean of its divisors is an integer number (4613323).

Almost surely, 2^31938345 is an apocalyptic number.

It is an amenable number.

31938345 is a deficient number, since it is larger than the sum of its proper divisors (23421531).

31938345 is a wasteful number, since it uses less digits than its factorization.

31938345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709752 (or 709749 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 31938345 is about 5651.4020384326. The cubic root of 31938345 is about 317.2761809437.

The spelling of 31938345 in words is "thirty-one million, nine hundred thirty-eight thousand, three hundred forty-five".