31324304 has 20 divisors (see below), whose sum is σ = 66208560. Its totient is φ = 14238240.

The previous prime is 31324303. The next prime is 31324313. The reversal of 31324304 is 40342313.

It is not an unprimeable number, because it can be changed into a prime (31324301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88814 + ... + 89165.

It is an arithmetic number, because the mean of its divisors is an integer number (3310428).

Almost surely, 2^31324304 is an apocalyptic number.

It is an amenable number.

31324304 is an abundant number, since it is smaller than the sum of its proper divisors (34884256).

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

31324304 is a wasteful number, since it uses less digits than its factorization.

31324304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177998 (or 177992 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 31324304 is about 5596.8119496728. The cubic root of 31324304 is about 315.2297106679.

Adding to 31324304 its reverse (40342313), we get a palindrome (71666617).

Subtracting 31324304 from its reverse (40342313), we obtain a square (9018009 = 3003²).

The spelling of 31324304 in words is "thirty-one million, three hundred twenty-four thousand, three hundred four".