724660 has 24 divisors (see below), whose sum is σ = 1602720. Its totient is φ = 274464.

The previous prime is 724651. The next prime is 724721. The reversal of 724660 is 66427.

724660 = T₁₇₀ + T₁₇₁ + ... + T₂₀₉.

724660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

724660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574 + ... + 1333.

It is an arithmetic number, because the mean of its divisors is an integer number (66780).

2⁷²⁴⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

724660 is an abundant number, since it is smaller than the sum of its proper divisors (878060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

724660 is a wasteful number, since it uses less digits than its factorization.

724660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935 (or 1933 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 724660 is about 851.2696400084. The cubic root of 724660 is about 89.8210435750.

The spelling of 724660 in words is "seven hundred twenty-four thousand, six hundred sixty".