724523328 has 42 divisors (see below), whose sum is σ = 2076716954. Its totient is φ = 241507584.

The previous prime is 724523273. The next prime is 724523329. The reversal of 724523328 is 823325427.

It can be written as a sum of positive squares in only one way, i.e., 389193984 + 335329344 = 19728^2 + 18312^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 724523292 and 724523301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724523329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 628351 + ... + 629502.

Almost surely, 2^724523328 is an apocalyptic number.

It is an amenable number.

724523328 is an abundant number, since it is smaller than the sum of its proper divisors (1352193626).

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

724523328 is a wasteful number, since it uses less digits than its factorization.

724523328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257871 (or 1257858 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 724523328 is about 26916.9710034394. The cubic root of 724523328 is about 898.1539642392.

The spelling of 724523328 in words is "seven hundred twenty-four million, five hundred twenty-three thousand, three hundred twenty-eight".