724664 has 8 divisors (see below), whose sum is σ = 1358760. Its totient is φ = 362328.

The previous prime is 724651. The next prime is 724721. The reversal of 724664 is 466427.

724664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45284 + ... + 45299.

It is an arithmetic number, because the mean of its divisors is an integer number (169845).

2⁷²⁴⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

724664 is a deficient number, since it is larger than the sum of its proper divisors (634096).

724664 is a wasteful number, since it uses less digits than its factorization.

724664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90589 (or 90585 counting only the distinct ones).

The product of its digits is 8064, while the sum is 29.

The square root of 724664 is about 851.2719894370. The cubic root of 724664 is about 89.8212088403.

The spelling of 724664 in words is "seven hundred twenty-four thousand, six hundred sixty-four".