28116025 has 12 divisors (see below), whose sum is σ = 39844672. Its totient is φ = 19279440.

The previous prime is 28115999. The next prime is 28116043. The reversal of 28116025 is 52061182.

It is not a de Polignac number, because 28116025 - 2⁷ = 28115897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80157 + ... + 80506.

Almost surely, 2^28116025 is an apocalyptic number.

28116025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28116025 is a deficient number, since it is larger than the sum of its proper divisors (11728647).

28116025 is a wasteful number, since it uses less digits than its factorization.

28116025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160680 (or 160675 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 28116025 is about 5302.4546202679. The cubic root of 28116025 is about 304.0777480332.

It can be divided in two parts, 2811 and 6025, that added together give a square (8836 = 94²).

The spelling of 28116025 in words is "twenty-eight million, one hundred sixteen thousand, twenty-five".