31089772 has 12 divisors (see below), whose sum is σ = 62179600. Its totient is φ = 13324176.

The previous prime is 31089733. The next prime is 31089797. The reversal of 31089772 is 27798013.

31089772 is an admirable number.

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, 555147 + ... + 555202.

Almost surely, 2^31089772 is an apocalyptic number.

It is an amenable number.

31089772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31089772 is a wasteful number, since it uses less digits than its factorization.

31089772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110360 (or 1110358 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 31089772 is about 5575.8202983956. The cubic root of 31089772 is about 314.4410074342.

It can be divided in two parts, 3108 and 9772, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 31089772 in words is "thirty-one million, eighty-nine thousand, seven hundred seventy-two".