31473992 has 16 divisors (see below), whose sum is σ = 64378800. Its totient is φ = 14306320.

The previous prime is 31473991. The next prime is 31474007. The reversal of 31473992 is 29937413.

It is a super-2 number, since 2×31473992² = 1981224344832128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31473991) 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, 178742 + ... + 178917.

It is an arithmetic number, because the mean of its divisors is an integer number (4023675).

Almost surely, 2^31473992 is an apocalyptic number.

It is an amenable number.

31473992 is an abundant number, since it is smaller than the sum of its proper divisors (32904808).

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

31473992 is a wasteful number, since it uses less digits than its factorization.

31473992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357676 (or 357672 counting only the distinct ones).

The product of its digits is 40824, while the sum is 38.

The square root of 31473992 is about 5610.1686249167. The cubic root of 31473992 is about 315.7310374952.

The spelling of 31473992 in words is "thirty-one million, four hundred seventy-three thousand, nine hundred ninety-two".