31442664 has 32 divisors (see below), whose sum is σ = 85753440. Its totient is φ = 9528000.

The previous prime is 31442657. The next prime is 31442669. The reversal of 31442664 is 46624413.

It is a super-2 number, since 2×31442664² = 1977282238833792, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (31442669) 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, 59287 + ... + 59814.

It is an arithmetic number, because the mean of its divisors is an integer number (2679795).

Almost surely, 2^31442664 is an apocalyptic number.

It is an amenable number.

31442664 is an abundant number, since it is smaller than the sum of its proper divisors (54310776).

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

31442664 is a wasteful number, since it uses less digits than its factorization.

31442664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119121 (or 119117 counting only the distinct ones).

The product of its digits is 13824, while the sum is 30.

The square root of 31442664 is about 5607.3758568514. The cubic root of 31442664 is about 315.6262472127.

The spelling of 31442664 in words is "thirty-one million, four hundred forty-two thousand, six hundred sixty-four".