28198760 has 32 divisors (see below), whose sum is σ = 64168200. Its totient is φ = 11152768.

The previous prime is 28198739. The next prime is 28198763. The reversal of 28198760 is 6789182.

It can be written as a sum of positive squares in 4 ways, for example, as 1304164 + 26894596 = 1142^2 + 5186^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28198763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316796 + ... + 316884.

Almost surely, 2^28198760 is an apocalyptic number.

28198760 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 28198760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32084100).

28198760 is an abundant number, since it is smaller than the sum of its proper divisors (35969440).

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

28198760 is an frugal number, since it uses more digits than its factorization.

28198760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 28198760 is about 5310.2504649028. The cubic root of 28198760 is about 304.3757185085.

The spelling of 28198760 in words is "twenty-eight million, one hundred ninety-eight thousand, seven hundred sixty".