724428816 has 40 divisors (see below), whose sum is σ = 1935977280. Its totient is φ = 233149056.

The previous prime is 724428791. The next prime is 724428829. The reversal of 724428816 is 618824427.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258820 + ... + 261603.

It is an arithmetic number, because the mean of its divisors is an integer number (48399432).

Almost surely, 2^724428816 is an apocalyptic number.

It is an amenable number.

724428816 is an abundant number, since it is smaller than the sum of its proper divisors (1211548464).

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

724428816 is a wasteful number, since it uses less digits than its factorization.

724428816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520463 (or 520457 counting only the distinct ones).

The product of its digits is 172032, while the sum is 42.

The square root of 724428816 is about 26915.2153251651. The cubic root of 724428816 is about 898.1149086673.

The spelling of 724428816 in words is "seven hundred twenty-four million, four hundred twenty-eight thousand, eight hundred sixteen".