722143644 has 12 divisors (see below), whose sum is σ = 1685001864. Its totient is φ = 240714544.

The previous prime is 722143613. The next prime is 722143691. The reversal of 722143644 is 446341227.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 30089307 + ... + 30089330.

It is an arithmetic number, because the mean of its divisors is an integer number (140416822).

Almost surely, 2^722143644 is an apocalyptic number.

It is an amenable number.

722143644 is an abundant number, since it is smaller than the sum of its proper divisors (962858220).

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

722143644 is a wasteful number, since it uses less digits than its factorization.

722143644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60178644 (or 60178642 counting only the distinct ones).

The product of its digits is 32256, while the sum is 33.

The square root of 722143644 is about 26872.7304902200. The cubic root of 722143644 is about 897.1695621208.

The spelling of 722143644 in words is "seven hundred twenty-two million, one hundred forty-three thousand, six hundred forty-four".