724940 has 24 divisors (see below), whose sum is σ = 1547952. Its totient is φ = 285120.

The previous prime is 724939. The next prime is 724949. The reversal of 724940 is 49427.

It is not an unprimeable number, because it can be changed into a prime (724949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070 + ... + 1610.

It is an arithmetic number, because the mean of its divisors is an integer number (64498).

2⁷²⁴⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

724940 is an abundant number, since it is smaller than the sum of its proper divisors (823012).

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

724940 is a wasteful number, since it uses less digits than its factorization.

724940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 615 counting only the distinct ones).

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

The square root of 724940 is about 851.4340843542. The cubic root of 724940 is about 89.8326106794.

The spelling of 724940 in words is "seven hundred twenty-four thousand, nine hundred forty".