28357200 has 90 divisors (see below), whose sum is σ = 98419854. Its totient is φ = 7560960.

The previous prime is 28357193. The next prime is 28357201. The reversal of 28357200 is 275382.

It can be written as a sum of positive squares in 3 ways, for example, as 97344 + 28259856 = 312^2 + 5316^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28357201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 339 + ... + 7538.

Almost surely, 2^28357200 is an apocalyptic number.

28357200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28357200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49209927).

28357200 is an abundant number, since it is smaller than the sum of its proper divisors (70062654).

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

28357200 is a wasteful number, since it uses less digits than its factorization.

28357200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7901 (or 7887 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 28357200 is about 5325.1478852704. The cubic root of 28357200 is about 304.9447181003.

The spelling of 28357200 in words is "twenty-eight million, three hundred fifty-seven thousand, two hundred".