28539200 has 42 divisors (see below), whose sum is σ = 70228206. Its totient is φ = 11415040.

The previous prime is 28539179. The next prime is 28539211. The reversal of 28539200 is 293582.

It can be written as a sum of positive squares in 3 ways, for example, as 5345344 + 23193856 = 2312^2 + 4816^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7319 + ... + 10518.

Almost surely, 2^28539200 is an apocalyptic number.

28539200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28539200 is an abundant number, since it is smaller than the sum of its proper divisors (41689006).

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

28539200 is a wasteful number, since it uses less digits than its factorization.

28539200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17859 (or 17844 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 28539200 is about 5342.2092808126. The cubic root of 28539200 is about 305.5957182591.

The spelling of 28539200 in words is "twenty-eight million, five hundred thirty-nine thousand, two hundred".