28657275 has 24 divisors (see below), whose sum is σ = 47836224. Its totient is φ = 15136800.

The previous prime is 28657273. The next prime is 28657283. The reversal of 28657275 is 57275682.

It is not a de Polignac number, because 28657275 - 2¹ = 28657273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28657273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6240 + ... + 9810.

It is an arithmetic number, because the mean of its divisors is an integer number (1993176).

Almost surely, 2^28657275 is an apocalyptic number.

28657275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28657275 is a deficient number, since it is larger than the sum of its proper divisors (19178949).

28657275 is a wasteful number, since it uses less digits than its factorization.

28657275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691 (or 3686 counting only the distinct ones).

The product of its digits is 235200, while the sum is 42.

The square root of 28657275 is about 5353.2490134497. The cubic root of 28657275 is about 306.0165846024.

The spelling of 28657275 in words is "twenty-eight million, six hundred fifty-seven thousand, two hundred seventy-five".