31442404 has 24 divisors (see below), whose sum is σ = 63258048. Its totient is φ = 13395360.

The previous prime is 31442381. The next prime is 31442413. The reversal of 31442404 is 40424413.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1599 + ... + 8089.

It is an arithmetic number, because the mean of its divisors is an integer number (2635752).

Almost surely, 2^31442404 is an apocalyptic number.

It is an amenable number.

31442404 is an abundant number, since it is smaller than the sum of its proper divisors (31815644).

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

31442404 is a wasteful number, since it uses less digits than its factorization.

31442404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675 (or 6673 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 31442404 is about 5607.3526730535. The cubic root of 31442404 is about 315.6253772371.

Adding to 31442404 its reverse (40424413), we get a palindrome (71866817).

Subtracting 31442404 from its reverse (40424413), we obtain a square (8982009 = 2997²).

The spelling of 31442404 in words is "thirty-one million, four hundred forty-two thousand, four hundred four".