28513200 has 60 divisors (see below), whose sum is σ = 91341128. Its totient is φ = 7603200.

The previous prime is 28513187. The next prime is 28513207. The reversal of 28513200 is 231582.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (28513207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10681 + ... + 13080.

Almost surely, 2^28513200 is an apocalyptic number.

28513200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28513200 is an abundant number, since it is smaller than the sum of its proper divisors (62827928).

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

28513200 is a wasteful number, since it uses less digits than its factorization.

28513200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23782 (or 23771 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 28513200 is about 5339.7752761703. The cubic root of 28513200 is about 305.5028880145.

Adding to 28513200 its reverse (231582), we get a palindrome (28744782).

The spelling of 28513200 in words is "twenty-eight million, five hundred thirteen thousand, two hundred".