722577228 has 12 divisors (see below), whose sum is σ = 1686013560. Its totient is φ = 240859072.

The previous prime is 722577227. The next prime is 722577259. The reversal of 722577228 is 822775227.

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

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 722577228.

It is not an unprimeable number, because it can be changed into a prime (722577227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30107373 + ... + 30107396.

It is an arithmetic number, because the mean of its divisors is an integer number (140501130).

Almost surely, 2^722577228 is an apocalyptic number.

It is an amenable number.

722577228 is an abundant number, since it is smaller than the sum of its proper divisors (963436332).

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

722577228 is a wasteful number, since it uses less digits than its factorization.

722577228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60214776 (or 60214774 counting only the distinct ones).

The product of its digits is 219520, while the sum is 42.

The square root of 722577228 is about 26880.7966399807. The cubic root of 722577228 is about 897.3490834406.

The spelling of 722577228 in words is "seven hundred twenty-two million, five hundred seventy-seven thousand, two hundred twenty-eight".