31979020 has 12 divisors (see below), whose sum is σ = 67155984. Its totient is φ = 12791600.

The previous prime is 31978979. The next prime is 31979029. The reversal of 31979020 is 2097913.

It is not an unprimeable number, because it can be changed into a prime (31979029) 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, 799456 + ... + 799495.

It is an arithmetic number, because the mean of its divisors is an integer number (5596332).

Almost surely, 2^31979020 is an apocalyptic number.

It is an amenable number.

31979020 is an abundant number, since it is smaller than the sum of its proper divisors (35176964).

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

31979020 is a wasteful number, since it uses less digits than its factorization.

31979020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598960 (or 1598958 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 31979020 is about 5654.9995579133. Note that the first 3 decimals coincide. The cubic root of 31979020 is about 317.4108125708.

The spelling of 31979020 in words is "thirty-one million, nine hundred seventy-nine thousand, twenty".