28116975 has 12 divisors (see below), whose sum is σ = 46486856. Its totient is φ = 14995680.

The previous prime is 28116953. The next prime is 28116983. The reversal of 28116975 is 57961182.

It is not a de Polignac number, because 28116975 - 2⁵ = 28116943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187372 + ... + 187521.

Almost surely, 2^28116975 is an apocalyptic number.

28116975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28116975 is a deficient number, since it is larger than the sum of its proper divisors (18369881).

28116975 is a wasteful number, since it uses less digits than its factorization.

28116975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374906 (or 374901 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 28116975 is about 5302.5442006644. The cubic root of 28116975 is about 304.0811727777.

The spelling of 28116975 in words is "twenty-eight million, one hundred sixteen thousand, nine hundred seventy-five".