31628893490 has 16 divisors (see below), whose sum is σ = 56936050200. Its totient is φ = 12650659200.

The previous prime is 31628893489. The next prime is 31628893561. The reversal of 31628893490 is 9439882613.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8010429001 + 23618464489 = 89501^2 + 153683^2 .

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, 46286 + ... + 255734.

Almost surely, 2^31628893490 is an apocalyptic number.

31628893490 is a deficient number, since it is larger than the sum of its proper divisors (25307156710).

31628893490 is a wasteful number, since it uses less digits than its factorization.

31628893490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224557.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 31628893490 in words is "thirty-one billion, six hundred twenty-eight million, eight hundred ninety-three thousand, four hundred ninety".