722128433 has 8 divisors (see below), whose sum is σ = 788630976. Its totient is φ = 657190800.

The previous prime is 722128417. The next prime is 722128441. The reversal of 722128433 is 334821227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 722128433 - 2⁴ = 722128417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 722128433.

It is not an unprimeable number, because it can be changed into a prime (722128133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390263 + ... + 392108.

It is an arithmetic number, because the mean of its divisors is an integer number (98578872).

Almost surely, 2^722128433 is an apocalyptic number.

It is an amenable number.

722128433 is a deficient number, since it is larger than the sum of its proper divisors (66502543).

722128433 is a wasteful number, since it uses less digits than its factorization.

722128433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782455.

The product of its digits is 16128, while the sum is 32.

The square root of 722128433 is about 26872.4474694807. The cubic root of 722128433 is about 897.1632628468.

The spelling of 722128433 in words is "seven hundred twenty-two million, one hundred twenty-eight thousand, four hundred thirty-three".