28561200 has 60 divisors (see below), whose sum is σ = 91494888. Its totient is φ = 7616000.

The previous prime is 28561187. The next prime is 28561219. The reversal of 28561200 is 216582.

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

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10701 + ... + 13100.

Almost surely, 2^28561200 is an apocalyptic number.

28561200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28561200 is an abundant number, since it is smaller than the sum of its proper divisors (62933688).

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

28561200 is a wasteful number, since it uses less digits than its factorization.

28561200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23822 (or 23811 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28561200 is about 5344.2679573539. The cubic root of 28561200 is about 305.6742229006.

Adding to 28561200 its reverse (216582), we get a palindrome (28777782).

The spelling of 28561200 in words is "twenty-eight million, five hundred sixty-one thousand, two hundred".