31144480 has 24 divisors (see below), whose sum is σ = 73579212. Its totient is φ = 12457728.

The previous prime is 31144471. The next prime is 31144499. The reversal of 31144480 is 8444113.

It can be written as a sum of positive squares in 2 ways, for example, as 29899024 + 1245456 = 5468^2 + 1116^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97167 + ... + 97486.

Almost surely, 2^31144480 is an apocalyptic number.

It is an amenable number.

31144480 is an abundant number, since it is smaller than the sum of its proper divisors (42434732).

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

31144480 is a wasteful number, since it uses less digits than its factorization.

31144480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194668 (or 194660 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 31144480 is about 5580.7239673720. The cubic root of 31144480 is about 314.6253377046.

Adding to 31144480 its reverse (8444113), we get a palindrome (39588593).

The spelling of 31144480 in words is "thirty-one million, one hundred forty-four thousand, four hundred eighty".