28625275 has 12 divisors (see below), whose sum is σ = 40566352. Its totient is φ = 19628640.

The previous prime is 28625251. The next prime is 28625279. The reversal of 28625275 is 57252682.

It is not a de Polignac number, because 28625275 - 2¹⁵ = 28592507 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28625279) 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, 81612 + ... + 81961.

Almost surely, 2^28625275 is an apocalyptic number.

28625275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28625275 is a deficient number, since it is larger than the sum of its proper divisors (11941077).

28625275 is a wasteful number, since it uses less digits than its factorization.

28625275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163590 (or 163585 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 28625275 is about 5350.2593395087. The cubic root of 28625275 is about 305.9026382264.

It can be divided in two parts, 28625 and 275, that added together give a square (28900 = 170²).

The spelling of 28625275 in words is "twenty-eight million, six hundred twenty-five thousand, two hundred seventy-five".