31793040 has 160 divisors (see below), whose sum is σ = 112492800. Its totient is φ = 8248320.

The previous prime is 31792993. The next prime is 31793059. The reversal of 31793040 is 4039713.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31792995 and 31793013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88381 + ... + 88739.

It is an arithmetic number, because the mean of its divisors is an integer number (703080).

Almost surely, 2^31793040 is an apocalyptic number.

31793040 is a gapful number since it is divisible by the number (30) 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 31793040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56246400).

31793040 is an abundant number, since it is smaller than the sum of its proper divisors (80699760).

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

31793040 is a wasteful number, since it uses less digits than its factorization.

31793040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 31793040 is about 5638.5317237735. The cubic root of 31793040 is about 316.7942951222.

The spelling of 31793040 in words is "thirty-one million, seven hundred ninety-three thousand, forty".