724646556 has 72 divisors (see below), whose sum is σ = 2023860384. Its totient is φ = 217451520.

The previous prime is 724646537. The next prime is 724646557. The reversal of 724646556 is 655646427.

724646556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×724646556² = 1050225262245322272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724646557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11665 + ... + 39816.

It is an arithmetic number, because the mean of its divisors is an integer number (28109172).

Almost surely, 2^724646556 is an apocalyptic number.

It is an amenable number.

724646556 is an abundant number, since it is smaller than the sum of its proper divisors (1299213828).

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

724646556 is a wasteful number, since it uses less digits than its factorization.

724646556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51531 (or 51526 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The square root of 724646556 is about 26919.2599452511. The cubic root of 724646556 is about 898.2048811379.

The spelling of 724646556 in words is "seven hundred twenty-four million, six hundred forty-six thousand, five hundred fifty-six".