31628215684 has 12 divisors (see below), whose sum is σ = 59607021964. Its totient is φ = 14597637984.

The previous prime is 31628215681. The next prime is 31628215721. The reversal of 31628215684 is 48651282613.

It can be written as a sum of positive squares in 2 ways, for example, as 15356662084 + 16271553600 = 123922^2 + 127560^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (31628215681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304117407 + ... + 304117510.

Almost surely, 2^31628215684 is an apocalyptic number.

It is an amenable number.

31628215684 is a deficient number, since it is larger than the sum of its proper divisors (27978806280).

31628215684 is a wasteful number, since it uses less digits than its factorization.

31628215684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608234934 (or 608234932 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The spelling of 31628215684 in words is "thirty-one billion, six hundred twenty-eight million, two hundred fifteen thousand, six hundred eighty-four".