28116125 has 8 divisors (see below), whose sum is σ = 35089080. Its totient is φ = 22492800.

The previous prime is 28116107. The next prime is 28116131. The reversal of 28116125 is 52161182.

28116125 = 203² + 204² + ... + 452².

It can be written as a sum of positive squares in 4 ways, for example, as 1138489 + 26977636 = 1067^2 + 5194^2 .

It is not a de Polignac number, because 28116125 - 2⁶ = 28116061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28116094 and 28116103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112340 + ... + 112589.

It is an arithmetic number, because the mean of its divisors is an integer number (4386135).

Almost surely, 2^28116125 is an apocalyptic number.

28116125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28116125 is a deficient number, since it is larger than the sum of its proper divisors (6972955).

28116125 is an equidigital number, since it uses as much as digits as its factorization.

28116125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224944 (or 224934 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 28116125 is about 5302.4640498546. The cubic root of 28116125 is about 304.0781085363.

The spelling of 28116125 in words is "twenty-eight million, one hundred sixteen thousand, one hundred twenty-five".