28528555 has 16 divisors (see below), whose sum is σ = 37550304. Its totient is φ = 20634880.

The previous prime is 28528543. The next prime is 28528571. The reversal of 28528555 is 55582582.

It is a happy number.

It is not a de Polignac number, because 28528555 - 2⁷ = 28528427 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9519 + ... + 12151.

It is an arithmetic number, because the mean of its divisors is an integer number (2346894).

Almost surely, 2^28528555 is an apocalyptic number.

28528555 is a deficient number, since it is larger than the sum of its proper divisors (9021749).

28528555 is a wasteful number, since it uses less digits than its factorization.

28528555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846.

The product of its digits is 160000, while the sum is 40.

The square root of 28528555 is about 5341.2128772405. The cubic root of 28528555 is about 305.5577182339.

The spelling of 28528555 in words is "twenty-eight million, five hundred twenty-eight thousand, five hundred fifty-five".