28528227 has 64 divisors (see below), whose sum is σ = 55157760. Its totient is φ = 14141952.

The previous prime is 28528189. The next prime is 28528231. The reversal of 28528227 is 72282582.

It is not a de Polignac number, because 28528227 - 2⁶ = 28528163 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28528191 and 28528200.

It is not an unprimeable number, because it can be changed into a prime (28528427) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41428 + ... + 42110.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^28528227 is an apocalyptic number.

28528227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28528227 is a deficient number, since it is larger than the sum of its proper divisors (26629533).

28528227 is a wasteful number, since it uses less digits than its factorization.

28528227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 723 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 28528227 is about 5341.1821725157. The cubic root of 28528227 is about 305.5565472046.

The spelling of 28528227 in words is "twenty-eight million, five hundred twenty-eight thousand, two hundred twenty-seven".