31140304 has 20 divisors (see below), whose sum is σ = 64975876. Its totient is φ = 14372352.

The previous prime is 31140293. The next prime is 31140313. The reversal of 31140304 is 40304113.

It can be written as a sum of positive squares in 2 ways, for example, as 2496400 + 28643904 = 1580^2 + 5352^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 74649 + ... + 75064.

Almost surely, 2^31140304 is an apocalyptic number.

It is an amenable number.

31140304 is an abundant number, since it is smaller than the sum of its proper divisors (33835572).

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

31140304 is a wasteful number, since it uses less digits than its factorization.

31140304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149734 (or 149728 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31140304 is about 5580.3498098238. The cubic root of 31140304 is about 314.6112749221.

Adding to 31140304 its reverse (40304113), we get a palindrome (71444417).

The spelling of 31140304 in words is "thirty-one million, one hundred forty thousand, three hundred four".