28545288 has 16 divisors (see below), whose sum is σ = 71363280. Its totient is φ = 9515088.

The previous prime is 28545259. The next prime is 28545289. The reversal of 28545288 is 88254582.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28545289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594670 + ... + 594717.

It is an arithmetic number, because the mean of its divisors is an integer number (4460205).

Almost surely, 2^28545288 is an apocalyptic number.

It is an amenable number.

28545288 is an abundant number, since it is smaller than the sum of its proper divisors (42817992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28545288 is a wasteful number, since it uses less digits than its factorization.

28545288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189396 (or 1189392 counting only the distinct ones).

The product of its digits is 204800, while the sum is 42.

The square root of 28545288 is about 5342.7790521413. The cubic root of 28545288 is about 305.6174466708.

The spelling of 28545288 in words is "twenty-eight million, five hundred forty-five thousand, two hundred eighty-eight".