28545084 has 18 divisors (see below), whose sum is σ = 72155720. Its totient is φ = 9515016.

The previous prime is 28545073. The next prime is 28545089. The reversal of 28545084 is 48054582.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 792919 = 28545084 / (2 + 8 + 5 + 4 + 5 + 0 + 8 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28545089) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 396424 + ... + 396495.

Almost surely, 2^28545084 is an apocalyptic number.

It is an amenable number.

28545084 is an abundant number, since it is smaller than the sum of its proper divisors (43610636).

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

28545084 is a wasteful number, since it uses less digits than its factorization.

28545084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792929 (or 792924 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 28545084 is about 5342.7599609191. The cubic root of 28545084 is about 305.6167186334.

It can be divided in two parts, 285 and 45084, that added together give a square (45369 = 213²).

The spelling of 28545084 in words is "twenty-eight million, five hundred forty-five thousand, eighty-four".