31097480 has 16 divisors (see below), whose sum is σ = 69969420. Its totient is φ = 12438976.

The previous prime is 31097467. The next prime is 31097519. The reversal of 31097480 is 8479013.

It can be written as a sum of positive squares in 2 ways, for example, as 30891364 + 206116 = 5558^2 + 454^2 .

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, 388679 + ... + 388758.

Almost surely, 2^31097480 is an apocalyptic number.

It is an amenable number.

31097480 is an abundant number, since it is smaller than the sum of its proper divisors (38871940).

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

31097480 is a wasteful number, since it uses less digits than its factorization.

31097480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777448 (or 777444 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 31097480 is about 5576.5114543055. The cubic root of 31097480 is about 314.4669914461.

The spelling of 31097480 in words is "thirty-one million, ninety-seven thousand, four hundred eighty".