724139244 has 48 divisors (see below), whose sum is σ = 1898517600. Its totient is φ = 238664448.

The previous prime is 724139237. The next prime is 724139263. The reversal of 724139244 is 442931427.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 724139199 and 724139208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28057 + ... + 47280.

It is an arithmetic number, because the mean of its divisors is an integer number (39552450).

Almost surely, 2^724139244 is an apocalyptic number.

It is an amenable number.

724139244 is an abundant number, since it is smaller than the sum of its proper divisors (1174378356).

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

724139244 is a wasteful number, since it uses less digits than its factorization.

724139244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75439 (or 75431 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 724139244 is about 26909.8354510019. The cubic root of 724139244 is about 897.9952265195.

The spelling of 724139244 in words is "seven hundred twenty-four million, one hundred thirty-nine thousand, two hundred forty-four".