722454624 has 72 divisors (see below), whose sum is σ = 2059162560. Its totient is φ = 240269568.

The previous prime is 722454611. The next prime is 722454701. The reversal of 722454624 is 426454227.

722454624 is a `hidden beast` number, since 7 + 2 + 24 + 5 + 4 + 624 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 135334 + ... + 140570.

It is an arithmetic number, because the mean of its divisors is an integer number (28599480).

Almost surely, 2^722454624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722454624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029581280).

722454624 is an abundant number, since it is smaller than the sum of its proper divisors (1336707936).

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

722454624 is a wasteful number, since it uses less digits than its factorization.

722454624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5732 (or 5721 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

The square root of 722454624 is about 26878.5160304657. The cubic root of 722454624 is about 897.2983277078.

The spelling of 722454624 in words is "seven hundred twenty-two million, four hundred fifty-four thousand, six hundred twenty-four".