31113890 has 16 divisors (see below), whose sum is σ = 56142720. Its totient is φ = 12414960.

The previous prime is 31113889. The next prime is 31113911. The reversal of 31113890 is 9831113.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701 + ... + 7919.

It is an arithmetic number, because the mean of its divisors is an integer number (3508920).

Almost surely, 2^31113890 is an apocalyptic number.

31113890 is a deficient number, since it is larger than the sum of its proper divisors (25028830).

31113890 is a wasteful number, since it uses less digits than its factorization.

31113890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7657.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 31113890 is about 5577.9826102275. The cubic root of 31113890 is about 314.5222959904.

The spelling of 31113890 in words is "thirty-one million, one hundred thirteen thousand, eight hundred ninety".