222656772 has 48 divisors (see below), whose sum is σ = 563122112. Its totient is φ = 68065920.

The previous prime is 222656747. The next prime is 222656783. The reversal of 222656772 is 277656222.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 222656772.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19947 + ... + 29037.

Almost surely, 2^222656772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222656772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281561056).

222656772 is an abundant number, since it is smaller than the sum of its proper divisors (340465340).

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

222656772 is a wasteful number, since it uses less digits than its factorization.

222656772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9268 (or 9266 counting only the distinct ones).

The product of its digits is 141120, while the sum is 39.

The square root of 222656772 is about 14921.6879742206. The cubic root of 222656772 is about 606.1014218816.

The spelling of 222656772 in words is "two hundred twenty-two million, six hundred fifty-six thousand, seven hundred seventy-two".