722271428 has 6 divisors (see below), whose sum is σ = 1263975006. Its totient is φ = 361135712.

The previous prime is 722271397. The next prime is 722271437. The reversal of 722271428 is 824172227.

722271428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 522671044 + 199600384 = 22862^2 + 14128^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90283925 + ... + 90283932.

It is an arithmetic number, because the mean of its divisors is an integer number (210662501).

Almost surely, 2^722271428 is an apocalyptic number.

It is an amenable number.

722271428 is a deficient number, since it is larger than the sum of its proper divisors (541703578).

722271428 is a wasteful number, since it uses less digits than its factorization.

722271428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180567861 (or 180567859 counting only the distinct ones).

The product of its digits is 25088, while the sum is 35.

The square root of 722271428 is about 26875.1079625738. The cubic root of 722271428 is about 897.2224773336. Note that the first 3 decimals are identical.

The spelling of 722271428 in words is "seven hundred twenty-two million, two hundred seventy-one thousand, four hundred twenty-eight".