28022825 has 6 divisors (see below), whose sum is σ = 34748334. Its totient is φ = 22418240.

The previous prime is 28022789. The next prime is 28022831. The reversal of 28022825 is 52822082.

It can be written as a sum of positive squares in 3 ways, for example, as 4713241 + 23309584 = 2171^2 + 4828^2 .

It is not a de Polignac number, because 28022825 - 2⁸ = 28022569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 560432 + ... + 560481.

It is an arithmetic number, because the mean of its divisors is an integer number (5791389).

Almost surely, 2^28022825 is an apocalyptic number.

28022825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28022825 is a deficient number, since it is larger than the sum of its proper divisors (6725509).

28022825 is a wasteful number, since it uses less digits than its factorization.

28022825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120923 (or 1120918 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 28022825 is about 5293.6589425463. The cubic root of 28022825 is about 303.7413868524.

The spelling of 28022825 in words is "twenty-eight million, twenty-two thousand, eight hundred twenty-five".