31304442 has 32 divisors (see below), whose sum is σ = 69253632. Its totient is φ = 9370944.

The previous prime is 31304437. The next prime is 31304467. The reversal of 31304442 is 24440313.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2538 + ... + 8309.

It is an arithmetic number, because the mean of its divisors is an integer number (2164176).

Almost surely, 2^31304442 is an apocalyptic number.

31304442 is an abundant number, since it is smaller than the sum of its proper divisors (37949190).

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

31304442 is a wasteful number, since it uses less digits than its factorization.

31304442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10902.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 31304442 is about 5595.0372652914. The cubic root of 31304442 is about 315.1630700139.

Adding to 31304442 its reverse (24440313), we get a palindrome (55744755).

The spelling of 31304442 in words is "thirty-one million, three hundred four thousand, four hundred forty-two".