731316656 has 20 divisors (see below), whose sum is σ = 1619344272. Its totient is φ = 313421376.

The previous prime is 731316647. The next prime is 731316661. The reversal of 731316656 is 656613137.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3264695 + ... + 3264918.

Almost surely, 2^731316656 is an apocalyptic number.

It is an amenable number.

731316656 is an abundant number, since it is smaller than the sum of its proper divisors (888027616).

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

731316656 is a wasteful number, since it uses less digits than its factorization.

731316656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6529628 (or 6529622 counting only the distinct ones).

The product of its digits is 68040, while the sum is 38.

The square root of 731316656 is about 27042.8670077712. The cubic root of 731316656 is about 900.9523482818.

The spelling of 731316656 in words is "seven hundred thirty-one million, three hundred sixteen thousand, six hundred fifty-six".