723988664 has 32 divisors (see below), whose sum is σ = 1618859520. Its totient is φ = 296789856.

The previous prime is 723988651. The next prime is 723988679. The reversal of 723988664 is 466889327.

It is a congruent number.

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, 279764 + ... + 282339.

It is an arithmetic number, because the mean of its divisors is an integer number (50589360).

Almost surely, 2^723988664 is an apocalyptic number.

It is an amenable number.

723988664 is an abundant number, since it is smaller than the sum of its proper divisors (894870856).

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

723988664 is a wasteful number, since it uses less digits than its factorization.

723988664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562139 (or 562135 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 53.

The square root of 723988664 is about 26907.0374437618. The cubic root of 723988664 is about 897.9329781346.

The spelling of 723988664 in words is "seven hundred twenty-three million, nine hundred eighty-eight thousand, six hundred sixty-four".