723449664 has 112 divisors (see below), whose sum is σ = 2430678400. Its totient is φ = 206696448.

The previous prime is 723449651. The next prime is 723449693. The reversal of 723449664 is 466944327.

It is a happy number.

723449664 is a `hidden beast` number, since 72 + 34 + 496 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (112).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17809 + ... + 42000.

Almost surely, 2^723449664 is an apocalyptic number.

It is an amenable number.

723449664 is an abundant number, since it is smaller than the sum of its proper divisors (1707228736).

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

723449664 is a wasteful number, since it uses less digits than its factorization.

723449664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59837 (or 59821 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The square root of 723449664 is about 26897.0196118455. The cubic root of 723449664 is about 897.7100897313.

The spelling of 723449664 in words is "seven hundred twenty-three million, four hundred forty-nine thousand, six hundred sixty-four".