31540992 has 72 divisors (see below), whose sum is σ = 95953536. Its totient is φ = 9010176.

The previous prime is 31540991. The next prime is 31541017. The reversal of 31540992 is 29904513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31540991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2443 + ... + 8309.

It is an arithmetic number, because the mean of its divisors is an integer number (1332688).

Almost surely, 2^31540992 is an apocalyptic number.

31540992 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31540992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47976768).

31540992 is an abundant number, since it is smaller than the sum of its proper divisors (64412544).

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

31540992 is an equidigital number, since it uses as much as digits as its factorization.

31540992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893 (or 5879 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 31540992 is about 5616.1367504718. The cubic root of 31540992 is about 315.9549153219.

The spelling of 31540992 in words is "thirty-one million, five hundred forty thousand, nine hundred ninety-two".