31327988 has 6 divisors (see below), whose sum is σ = 54823986. Its totient is φ = 15663992.

The previous prime is 31327987. The next prime is 31327999. The reversal of 31327988 is 88972313.

It can be written as a sum of positive squares in only one way, i.e., 18852964 + 12475024 = 4342^2 + 3532^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31327987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3915995 + ... + 3916002.

It is an arithmetic number, because the mean of its divisors is an integer number (9137331).

Almost surely, 2^31327988 is an apocalyptic number.

It is an amenable number.

31327988 is a deficient number, since it is larger than the sum of its proper divisors (23495998).

31327988 is a wasteful number, since it uses less digits than its factorization.

31327988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7832001 (or 7831999 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 31327988 is about 5597.1410559320. The cubic root of 31327988 is about 315.2420680665.

The spelling of 31327988 in words is "thirty-one million, three hundred twenty-seven thousand, nine hundred eighty-eight".