731372660 has 12 divisors (see below), whose sum is σ = 1535882628. Its totient is φ = 292549056.

The previous prime is 731372639. The next prime is 731372671. The reversal of 731372660 is 66273137.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 172712164 + 558660496 = 13142^2 + 23636^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 731372660.

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, 18284297 + ... + 18284336.

It is an arithmetic number, because the mean of its divisors is an integer number (127990219).

Almost surely, 2^731372660 is an apocalyptic number.

It is an amenable number.

731372660 is an abundant number, since it is smaller than the sum of its proper divisors (804509968).

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

731372660 is a wasteful number, since it uses less digits than its factorization.

731372660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36568642 (or 36568640 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 731372660 is about 27043.9024550822. The cubic root of 731372660 is about 900.9753459107.

The spelling of 731372660 in words is "seven hundred thirty-one million, three hundred seventy-two thousand, six hundred sixty".