28284275 has 12 divisors (see below), whose sum is σ = 35256672. Its totient is φ = 22508640.

The previous prime is 28284257. The next prime is 28284283. The reversal of 28284275 is 57248282.

It is a happy number.

It is not a de Polignac number, because 28284275 - 2⁶ = 28284211 is a prime.

It is a Duffinian 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, 2054 + ... + 7796.

It is an arithmetic number, because the mean of its divisors is an integer number (2938056).

Almost surely, 2^28284275 is an apocalyptic number.

28284275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28284275 is a deficient number, since it is larger than the sum of its proper divisors (6972397).

28284275 is a wasteful number, since it uses less digits than its factorization.

28284275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5950 (or 5945 counting only the distinct ones).

The product of its digits is 71680, while the sum is 38.

The square root of 28284275 is about 5318.2962497401. The cubic root of 28284275 is about 304.6830892633.

The spelling of 28284275 in words is "twenty-eight million, two hundred eighty-four thousand, two hundred seventy-five".