31420292 has 12 divisors (see below), whose sum is σ = 55530636. Its totient is φ = 15554400.

The previous prime is 31420223. The next prime is 31420303. The reversal of 31420292 is 29202413.

It can be written as a sum of positive squares in 2 ways, for example, as 17774656 + 13645636 = 4216^2 + 3694^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38483 + ... + 39290.

It is an arithmetic number, because the mean of its divisors is an integer number (4627553).

Almost surely, 2^31420292 is an apocalyptic number.

It is an amenable number.

31420292 is a deficient number, since it is larger than the sum of its proper divisors (24110344).

31420292 is a wasteful number, since it uses less digits than its factorization.

31420292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77878 (or 77876 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 31420292 is about 5605.3806293596. The cubic root of 31420292 is about 315.5513716043.

The spelling of 31420292 in words is "thirty-one million, four hundred twenty thousand, two hundred ninety-two".