724905856 has 16 divisors (see below), whose sum is σ = 1444148640. Its totient is φ = 362452864.

The previous prime is 724905827. The next prime is 724905859. The reversal of 724905856 is 658509427.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724905859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2831536 + ... + 2831791.

It is an arithmetic number, because the mean of its divisors is an integer number (90259290).

Almost surely, 2^724905856 is an apocalyptic number.

It is an amenable number.

724905856 is a deficient number, since it is larger than the sum of its proper divisors (719242784).

724905856 is an equidigital number, since it uses as much as digits as its factorization.

724905856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5663341 (or 5663329 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 724905856 is about 26924.0757687242. The cubic root of 724905856 is about 898.3120031314.

The spelling of 724905856 in words is "seven hundred twenty-four million, nine hundred five thousand, eight hundred fifty-six".