28125285 has 16 divisors (see below), whose sum is σ = 45152640. Its totient is φ = 14949440.

The previous prime is 28125239. The next prime is 28125287. The reversal of 28125285 is 58252182.

It is not a de Polignac number, because 28125285 - 2¹² = 28121189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28125287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1651 + ... + 7679.

It is an arithmetic number, because the mean of its divisors is an integer number (2822040).

Almost surely, 2^28125285 is an apocalyptic number.

It is an amenable number.

28125285 is a deficient number, since it is larger than the sum of its proper divisors (17027355).

28125285 is a wasteful number, since it uses less digits than its factorization.

28125285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6348.

The product of its digits is 12800, while the sum is 33.

The square root of 28125285 is about 5303.3277288887. The cubic root of 28125285 is about 304.1111269915. Note that the first 4 decimals are identical.

The spelling of 28125285 in words is "twenty-eight million, one hundred twenty-five thousand, two hundred eighty-five".