84222728 has 32 divisors (see below), whose sum is σ = 165634200. Its totient is φ = 40094208.

The previous prime is 84222713. The next prime is 84222737. The reversal of 84222728 is 82722248.

It can be written as a sum of positive squares in 4 ways, for example, as 78180964 + 6041764 = 8842^2 + 2458^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14450 + ... + 19422.

Almost surely, 2^84222728 is an apocalyptic number.

It is an amenable number.

84222728 is a deficient number, since it is larger than the sum of its proper divisors (81411472).

84222728 is a wasteful number, since it uses less digits than its factorization.

84222728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5081 (or 5077 counting only the distinct ones).

The product of its digits is 28672, while the sum is 35.

The square root of 84222728 is about 9177.2941545970. The cubic root of 84222728 is about 438.3386523504.

The spelling of 84222728 in words is "eighty-four million, two hundred twenty-two thousand, seven hundred twenty-eight".