724528 has 20 divisors (see below), whose sum is σ = 1604560. Its totient is φ = 310464.

The previous prime is 724519. The next prime is 724531. The reversal of 724528 is 825427.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 724496 and 724505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3123 + ... + 3346.

It is an arithmetic number, because the mean of its divisors is an integer number (80228).

2⁷²⁴⁵²⁸ is an apocalyptic number.

It is an amenable number.

724528 is an abundant number, since it is smaller than the sum of its proper divisors (880032).

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

724528 is a wasteful number, since it uses less digits than its factorization.

724528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6484 (or 6478 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 724528 is about 851.1921052265. The cubic root of 724528 is about 89.8155894780.

The spelling of 724528 in words is "seven hundred twenty-four thousand, five hundred twenty-eight".