724646 has 16 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 326784.

The previous prime is 724643. The next prime is 724651. The reversal of 724646 is 646427.

724646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×724646² = 1050223650632, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724643) 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, 926 + ... + 1518.

It is an arithmetic number, because the mean of its divisors is an integer number (74844).

2⁷²⁴⁶⁴⁶ is an apocalyptic number.

724646 is a deficient number, since it is larger than the sum of its proper divisors (472858).

724646 is a wasteful number, since it uses less digits than its factorization.

724646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its digits is 8064, while the sum is 29.

The square root of 724646 is about 851.2614169572. The cubic root of 724646 is about 89.8204651416.

The spelling of 724646 in words is "seven hundred twenty-four thousand, six hundred forty-six".