28116525 has 12 divisors (see below), whose sum is σ = 46486112. Its totient is φ = 14995440.

The previous prime is 28116467. The next prime is 28116527. The reversal of 28116525 is 52561182.

It is not a de Polignac number, because 28116525 - 2⁸ = 28116269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28116492 and 28116501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28116527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187369 + ... + 187518.

Almost surely, 2^28116525 is an apocalyptic number.

28116525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28116525 is a deficient number, since it is larger than the sum of its proper divisors (18369587).

28116525 is a wasteful number, since it uses less digits than its factorization.

28116525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374900 (or 374895 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 28116525 is about 5302.5017680337. The cubic root of 28116525 is about 304.0795505399.

The spelling of 28116525 in words is "twenty-eight million, one hundred sixteen thousand, five hundred twenty-five".