28922884 has 9 divisors (see below), whose sum is σ = 50633877. Its totient is φ = 14456064.

The previous prime is 28922879. The next prime is 28922911. The reversal of 28922884 is 48822982.

It is a happy number.

The square root of 28922884 is 5378.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1044484 + 27878400 = 1022^2 + 5280^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28922884.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9412 + ... + 12100.

Almost surely, 2^28922884 is an apocalyptic number.

28922884 is the 5378-th square number.

It is an amenable number.

28922884 is a deficient number, since it is larger than the sum of its proper divisors (21710993).

28922884 is an frugal number, since it uses more digits than its factorization.

28922884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5382 (or 2691 counting only the distinct ones).

The product of its digits is 147456, while the sum is 43.

The cubic root of 28922884 is about 306.9591134846.

Multiplying 28922884 by its product of digits (147456), we get a square (4264852783104 = 2065152²).

It can be divided in two parts, 2892 and 2884, that added together give a square (5776 = 76²).

The spelling of 28922884 in words is "twenty-eight million, nine hundred twenty-two thousand, eight hundred eighty-four".