724528631 has 4 divisors (see below), whose sum is σ = 724611672. Its totient is φ = 724445592.

The previous prime is 724528613. The next prime is 724528667. The reversal of 724528631 is 136825427.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 724528631 - 2¹⁴ = 724512247 is a prime.

It is a super-2 number, since 2×724528631² = 1049883474277468322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724528601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26660 + ... + 46473.

It is an arithmetic number, because the mean of its divisors is an integer number (181152918).

Almost surely, 2^724528631 is an apocalyptic number.

724528631 is a deficient number, since it is larger than the sum of its proper divisors (83041).

724528631 is an equidigital number, since it uses as much as digits as its factorization.

724528631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83040.

The product of its digits is 80640, while the sum is 38.

The square root of 724528631 is about 26917.0695098854. The cubic root of 724528631 is about 898.1561555185.

The spelling of 724528631 in words is "seven hundred twenty-four million, five hundred twenty-eight thousand, six hundred thirty-one".