428772222 has 24 divisors (see below), whose sum is σ = 958975680. Its totient is φ = 138313440.

The previous prime is 428772203. The next prime is 428772247. The reversal of 428772222 is 222277824.

428772222 is a `hidden beast` number, since 428 + 7 + 7 + 2 + 222 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 383647 + ... + 384762.

It is an arithmetic number, because the mean of its divisors is an integer number (39957320).

Almost surely, 2^428772222 is an apocalyptic number.

428772222 is an abundant number, since it is smaller than the sum of its proper divisors (530203458).

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

428772222 is a wasteful number, since it uses less digits than its factorization.

428772222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768448 (or 768445 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 428772222 is about 20706.8158344058. The cubic root of 428772222 is about 754.0651687276.

The spelling of 428772222 in words is "four hundred twenty-eight million, seven hundred seventy-two thousand, two hundred twenty-two".