28422824 has 8 divisors (see below), whose sum is σ = 53292810. Its totient is φ = 14211408.

The previous prime is 28422811. The next prime is 28422829. The reversal of 28422824 is 42822482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 13924 = 5330^2 + 118^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28422829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1776419 + ... + 1776434.

It is a self-describing number.

Almost surely, 2^28422824 is an apocalyptic number.

It is an amenable number.

28422824 is a deficient number, since it is larger than the sum of its proper divisors (24869986).

28422824 is a wasteful number, since it uses less digits than its factorization.

28422824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552859 (or 3552855 counting only the distinct ones).

The product of its digits is 16384, while the sum is 32.

The square root of 28422824 is about 5331.3060313585. The cubic root of 28422824 is about 305.1797703978.

The spelling of 28422824 in words is "twenty-eight million, four hundred twenty-two thousand, eight hundred twenty-four".