28198700 has 36 divisors (see below), whose sum is σ = 61428360. Its totient is φ = 11235840.

The previous prime is 28198691. The next prime is 28198727. The reversal of 28198700 is 789182.

It is a happy number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 41564 + ... + 42236.

Almost surely, 2^28198700 is an apocalyptic number.

28198700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28198700 is an abundant number, since it is smaller than the sum of its proper divisors (33229660).

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

28198700 is a wasteful number, since it uses less digits than its factorization.

28198700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 28198700 is about 5310.2448154487. The cubic root of 28198700 is about 304.3755026295.

The spelling of 28198700 in words is "twenty-eight million, one hundred ninety-eight thousand, seven hundred".