28198000 has 80 divisors (see below), whose sum is σ = 71263296. Its totient is φ = 10771200.

The previous prime is 28197971. The next prime is 28198007. The reversal of 28198000 is 89182.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 28198000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28198007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45694 + ... + 46306.

Almost surely, 2^28198000 is an apocalyptic number.

28198000 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 28198000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35631648).

28198000 is an abundant number, since it is smaller than the sum of its proper divisors (43065296).

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

28198000 is a wasteful number, since it uses less digits than its factorization.

28198000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 28198000 is about 5310.1789047074. The cubic root of 28198000 is about 304.3729840191.

The spelling of 28198000 in words is "twenty-eight million, one hundred ninety-eight thousand".