31340304 has 40 divisors (see below), whose sum is σ = 89959520. Its totient is φ = 10446624.

The previous prime is 31340303. The next prime is 31340317. The reversal of 31340304 is 40304313.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31340303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35842 + ... + 36705.

It is an arithmetic number, because the mean of its divisors is an integer number (2248988).

Almost surely, 2^31340304 is an apocalyptic number.

It is an amenable number.

31340304 is an abundant number, since it is smaller than the sum of its proper divisors (58619216).

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

31340304 is a wasteful number, since it uses less digits than its factorization.

31340304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72564 (or 72552 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 31340304 is about 5598.2411523621. The cubic root of 31340304 is about 315.2833731198.

Adding to 31340304 its reverse (40304313), we get a palindrome (71644617).

The spelling of 31340304 in words is "thirty-one million, three hundred forty thousand, three hundred four".