31306764 has 12 divisors (see below), whose sum is σ = 73049144. Its totient is φ = 10435584.

The previous prime is 31306753. The next prime is 31306771. The reversal of 31306764 is 46760313.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×31306764² = 1960226944303392, which contains 22 as substring.

It is an unprimeable number.

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, 1304437 + ... + 1304460.

Almost surely, 2^31306764 is an apocalyptic number.

It is an amenable number.

31306764 is an abundant number, since it is smaller than the sum of its proper divisors (41742380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31306764 is a wasteful number, since it uses less digits than its factorization.

31306764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608904 (or 2608902 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 31306764 is about 5595.2447667640. The cubic root of 31306764 is about 315.1708622047.

The spelling of 31306764 in words is "thirty-one million, three hundred six thousand, seven hundred sixty-four".