724489 has 8 divisors (see below), whose sum is σ = 807840. Its totient is φ = 645696.

The previous prime is 724487. The next prime is 724499. The reversal of 724489 is 984427.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 724489 - 2¹ = 724487 is a prime.

It is a super-2 number, since 2×724489² = 1049768622242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (724481) 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, 799 + ... + 1444.

It is an arithmetic number, because the mean of its divisors is an integer number (100980).

2⁷²⁴⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

724489 is a deficient number, since it is larger than the sum of its proper divisors (83351).

724489 is a wasteful number, since it uses less digits than its factorization.

724489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279.

The product of its digits is 16128, while the sum is 34.

The square root of 724489 is about 851.1691958712. The cubic root of 724489 is about 89.8139779135.

The spelling of 724489 in words is "seven hundred twenty-four thousand, four hundred eighty-nine".