31402944 has 112 divisors (see below), whose sum is σ = 97840800. Its totient is φ = 9842688.

The previous prime is 31402939. The next prime is 31402979. The reversal of 31402944 is 44920413.

It is a super-2 number, since 2×31402944² = 1972289783734272, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28842 + ... + 29910.

Almost surely, 2^31402944 is an apocalyptic number.

31402944 is a gapful number since it is divisible by the number (34) 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 31402944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48920400).

31402944 is an abundant number, since it is smaller than the sum of its proper divisors (66437856).

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

31402944 is a wasteful number, since it uses less digits than its factorization.

31402944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 31402944 is about 5603.8329739563. The cubic root of 31402944 is about 315.4932860738.

It can be divided in two parts, 3140 and 2944, that added together give a square (6084 = 78²).

The spelling of 31402944 in words is "thirty-one million, four hundred two thousand, nine hundred forty-four".