31439966 has 16 divisors (see below), whose sum is σ = 48465648. Its totient is φ = 15288000.

The previous prime is 31439959. The next prime is 31439977. The reversal of 31439966 is 66993413.

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, 23516 + ... + 24816.

It is an arithmetic number, because the mean of its divisors is an integer number (3029103).

Almost surely, 2^31439966 is an apocalyptic number.

31439966 is a deficient number, since it is larger than the sum of its proper divisors (17025682).

31439966 is a wasteful number, since it uses less digits than its factorization.

31439966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627.

The product of its digits is 104976, while the sum is 41.

The square root of 31439966 is about 5607.1352757001. The cubic root of 31439966 is about 315.6172193096.

The spelling of 31439966 in words is "thirty-one million, four hundred thirty-nine thousand, nine hundred sixty-six".