31444992 has 78 divisors (see below), whose sum is σ = 90936482. Its totient is φ = 10469376.

The previous prime is 31444939. The next prime is 31444993. The reversal of 31444992 is 29944413.

It can be written as a sum of positive squares in only one way, i.e., 19501056 + 11943936 = 4416^2 + 3456^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31444993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36438 + ... + 37290.

Almost surely, 2^31444992 is an apocalyptic number.

31444992 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 31444992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45468241).

31444992 is an abundant number, since it is smaller than the sum of its proper divisors (59491490).

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

31444992 is an equidigital number, since it uses as much as digits as its factorization.

31444992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883 (or 858 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 31444992 is about 5607.5834367399. The cubic root of 31444992 is about 315.6340366265.

The spelling of 31444992 in words is "thirty-one million, four hundred forty-four thousand, nine hundred ninety-two".