724490 has 16 divisors (see below), whose sum is σ = 1404648. Its totient is φ = 267456.

The previous prime is 724487. The next prime is 724499. The reversal of 724490 is 94427.

It can be written as a sum of positive squares in 4 ways, for example, as 247009 + 477481 = 497^2 + 691^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (724499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2657 + ... + 2916.

2⁷²⁴⁴⁹⁰ is an apocalyptic number.

724490 is a deficient number, since it is larger than the sum of its proper divisors (680158).

724490 is a wasteful number, since it uses less digits than its factorization.

724490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5593.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 724490 is about 851.1697832983. The cubic root of 724490 is about 89.8140192364.

The spelling of 724490 in words is "seven hundred twenty-four thousand, four hundred ninety".