31556968 has 8 divisors (see below), whose sum is σ = 59169330. Its totient is φ = 15778480.

The previous prime is 31556957. The next prime is 31557007. The reversal of 31556968 is 86965513.

It can be written as a sum of positive squares in only one way, i.e., 22448644 + 9108324 = 4738^2 + 3018^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1972303 + ... + 1972318.

Almost surely, 2^31556968 is an apocalyptic number.

It is an amenable number.

31556968 is a deficient number, since it is larger than the sum of its proper divisors (27612362).

31556968 is a wasteful number, since it uses less digits than its factorization.

31556968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944627 (or 3944623 counting only the distinct ones).

The product of its digits is 194400, while the sum is 43.

The square root of 31556968 is about 5617.5589004478. The cubic root of 31556968 is about 316.0082516672.

The spelling of 31556968 in words is "thirty-one million, five hundred fifty-six thousand, nine hundred sixty-eight".