31774990 has 16 divisors (see below), whose sum is σ = 61594848. Its totient is φ = 11732256.

The previous prime is 31774987. The next prime is 31774993. The reversal of 31774990 is 9947713.

It is an interprime number because it is at equal distance from previous prime (31774987) and next prime (31774993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31774993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122082 + ... + 122341.

It is an arithmetic number, because the mean of its divisors is an integer number (3849678).

Almost surely, 2^31774990 is an apocalyptic number.

31774990 is a deficient number, since it is larger than the sum of its proper divisors (29819858).

31774990 is a wasteful number, since it uses less digits than its factorization.

31774990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244443.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 31774990 is about 5636.9309025391. The cubic root of 31774990 is about 316.7343321084.

The spelling of 31774990 in words is "thirty-one million, seven hundred seventy-four thousand, nine hundred ninety".