31140704 has 24 divisors (see below), whose sum is σ = 70067088. Its totient is φ = 13345920.

The previous prime is 31140679. The next prime is 31140727. The reversal of 31140704 is 40704113.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 69287 + ... + 69734.

It is an arithmetic number, because the mean of its divisors is an integer number (2919462).

Almost surely, 2^31140704 is an apocalyptic number.

It is an amenable number.

31140704 is an abundant number, since it is smaller than the sum of its proper divisors (38926384).

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

31140704 is a wasteful number, since it uses less digits than its factorization.

31140704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139038 (or 139030 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 31140704 is about 5580.3856497558. The cubic root of 31140704 is about 314.6126219864.

Adding to 31140704 its reverse (40704113), we get a palindrome (71844817).

The spelling of 31140704 in words is "thirty-one million, one hundred forty thousand, seven hundred four".