722628432 has 40 divisors (see below), whose sum is σ = 2074212480. Its totient is φ = 240876000.

The previous prime is 722628407. The next prime is 722628443. The reversal of 722628432 is 234826227.

It is a happy number.

722628432 is a `hidden beast` number, since 7 + 22 + 628 + 4 + 3 + 2 = 666.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835944 + ... + 836807.

It is an arithmetic number, because the mean of its divisors is an integer number (51855312).

Almost surely, 2^722628432 is an apocalyptic number.

722628432 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

722628432 is an abundant number, since it is smaller than the sum of its proper divisors (1351584048).

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

722628432 is a wasteful number, since it uses less digits than its factorization.

722628432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672768 (or 1672756 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 722628432 is about 26881.7490502385. The cubic root of 722628432 is about 897.3702792268.

The spelling of 722628432 in words is "seven hundred twenty-two million, six hundred twenty-eight thousand, four hundred thirty-two".