31312408 has 16 divisors (see below), whose sum is σ = 58790880. Its totient is φ = 15634848.

The previous prime is 31312403. The next prime is 31312409. The reversal of 31312408 is 80421313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312403) 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 3 ways as a sum of consecutive naturals, for example, 4785 + ... + 9247.

It is an arithmetic number, because the mean of its divisors is an integer number (3674430).

Almost surely, 2^31312408 is an apocalyptic number.

It is an amenable number.

31312408 is a deficient number, since it is larger than the sum of its proper divisors (27478472).

31312408 is a wasteful number, since it uses less digits than its factorization.

31312408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5346 (or 5342 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 31312408 is about 5595.7491008801. The cubic root of 31312408 is about 315.1898007900.

It can be divided in two parts, 313 and 12408, that added together give a palindrome (12721).

The spelling of 31312408 in words is "thirty-one million, three hundred twelve thousand, four hundred eight".