31124304 has 40 divisors (see below), whose sum is σ = 89339520. Its totient is φ = 10374624.

The previous prime is 31124273. The next prime is 31124323. The reversal of 31124304 is 40342113.

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

It is a congruent number.

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, 35592 + ... + 36455.

It is an arithmetic number, because the mean of its divisors is an integer number (2233488).

Almost surely, 2^31124304 is an apocalyptic number.

It is an amenable number.

31124304 is an abundant number, since it is smaller than the sum of its proper divisors (58215216).

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

31124304 is a wasteful number, since it uses less digits than its factorization.

31124304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72064 (or 72052 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31124304 is about 5578.9160237451. The cubic root of 31124304 is about 314.5573828902.

Adding to 31124304 its reverse (40342113), we get a palindrome (71466417).

The spelling of 31124304 in words is "thirty-one million, one hundred twenty-four thousand, three hundred four".