28136475 has 36 divisors (see below), whose sum is σ = 52596336. Its totient is φ = 14351040.

The previous prime is 28136461. The next prime is 28136477. The reversal of 28136475 is 57463182.

28136475 is a `hidden beast` number, since 2 + 8 + 1 + 3 + 647 + 5 = 666.

It is not a de Polignac number, because 28136475 - 2⁵ = 28136443 is a prime.

It is a super-2 number, since 2×28136475² = 1583322450851250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28136477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2457 + ... + 7893.

Almost surely, 2^28136475 is an apocalyptic number.

28136475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28136475 is a deficient number, since it is larger than the sum of its proper divisors (24459861).

28136475 is a wasteful number, since it uses less digits than its factorization.

28136475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5476 (or 5468 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 28136475 is about 5304.3826219457. The cubic root of 28136475 is about 304.1514531287.

It can be divided in two parts, 28 and 136475, that added together give a triangular number (136503 = T₅₂₂).

The spelling of 28136475 in words is "twenty-eight million, one hundred thirty-six thousand, four hundred seventy-five".