4422728 has 8 divisors (see below), whose sum is σ = 8292630. Its totient is φ = 2211360.

The previous prime is 4422673. The next prime is 4422749. The reversal of 4422728 is 8272244.

It can be written as a sum of positive squares in only one way, i.e., 3378244 + 1044484 = 1838^2 + 1022^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 4422728.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276413 + ... + 276428.

Almost surely, 2^4422728 is an apocalyptic number.

It is an amenable number.

4422728 is a deficient number, since it is larger than the sum of its proper divisors (3869902).

4422728 is a wasteful number, since it uses less digits than its factorization.

4422728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552847 (or 552843 counting only the distinct ones).

The product of its digits is 7168, while the sum is 29.

The square root of 4422728 is about 2103.0282927246. The cubic root of 4422728 is about 164.1459141601.

The spelling of 4422728 in words is "four million, four hundred twenty-two thousand, seven hundred twenty-eight".