724690 has 8 divisors (see below), whose sum is σ = 1304460. Its totient is φ = 289872.

The previous prime is 724651. The next prime is 724721. The reversal of 724690 is 96427.

724690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 651249 + 73441 = 807^2 + 271^2 .

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

It is a super-2 number, since 2×724690² = 1050351192200, which contains 22 as substring.

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, 36225 + ... + 36244.

2⁷²⁴⁶⁹⁰ is an apocalyptic number.

724690 is a deficient number, since it is larger than the sum of its proper divisors (579770).

724690 is a wasteful number, since it uses less digits than its factorization.

724690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72476.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 724690 is about 851.2872605648. The cubic root of 724690 is about 89.8222830501.

The spelling of 724690 in words is "seven hundred twenty-four thousand, six hundred ninety".