31604442 has 16 divisors (see below), whose sum is σ = 63415872. Its totient is φ = 10500320.

The previous prime is 31604387. The next prime is 31604453. The reversal of 31604442 is 24440613.

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, 6603 + ... + 10334.

It is an arithmetic number, because the mean of its divisors is an integer number (3963492).

Almost surely, 2^31604442 is an apocalyptic number.

31604442 is an abundant number, since it is smaller than the sum of its proper divisors (31811430).

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

31604442 is a wasteful number, since it uses less digits than its factorization.

31604442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17253.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 31604442 is about 5621.7828133075. The cubic root of 31604442 is about 316.1666388627.

The spelling of 31604442 in words is "thirty-one million, six hundred four thousand, four hundred forty-two".