31443688628 has 12 divisors (see below), whose sum is σ = 60028860192. Its totient is φ = 14292585720.

The previous prime is 31443688571. The next prime is 31443688649. The reversal of 31443688628 is 82688634413.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31443688628.

It is a congruent number.

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, 357314600 + ... + 357314687.

It is an arithmetic number, because the mean of its divisors is an integer number (5002405016).

Almost surely, 2^31443688628 is an apocalyptic number.

It is an amenable number.

31443688628 is a deficient number, since it is larger than the sum of its proper divisors (28585171564).

31443688628 is a wasteful number, since it uses less digits than its factorization.

31443688628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714629302 (or 714629300 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 53.

The spelling of 31443688628 in words is "thirty-one billion, four hundred forty-three million, six hundred eighty-eight thousand, six hundred twenty-eight".