31089944 has 16 divisors (see below), whose sum is σ = 58514400. Its totient is φ = 15486112.

The previous prime is 31089941. The next prime is 31090021. The reversal of 31089944 is 44998013.

It is a junction number, because it is equal to n+sod(n) for n = 31089898 and 31089907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31089941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5072 + ... + 9375.

It is an arithmetic number, because the mean of its divisors is an integer number (3657150).

Almost surely, 2^31089944 is an apocalyptic number.

It is an amenable number.

31089944 is a deficient number, since it is larger than the sum of its proper divisors (27424456).

31089944 is a wasteful number, since it uses less digits than its factorization.

31089944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14722 (or 14718 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 31089944 is about 5575.8357221138. The cubic root of 31089944 is about 314.4415873007.

The spelling of 31089944 in words is "thirty-one million, eighty-nine thousand, nine hundred forty-four".