31949906 has 16 divisors (see below), whose sum is σ = 51680160. Its totient is φ = 14764320.

The previous prime is 31949899. The next prime is 31949917. The reversal of 31949906 is 60994913.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 8696 + ... + 11811.

It is an arithmetic number, because the mean of its divisors is an integer number (3230010).

Almost surely, 2^31949906 is an apocalyptic number.

31949906 is a deficient number, since it is larger than the sum of its proper divisors (19730254).

31949906 is a wasteful number, since it uses less digits than its factorization.

31949906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20569.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 31949906 is about 5652.4247894156. The cubic root of 31949906 is about 317.3144587300.

The spelling of 31949906 in words is "thirty-one million, nine hundred forty-nine thousand, nine hundred six".