28198101 has 16 divisors (see below), whose sum is σ = 38160000. Its totient is φ = 18520128.

The previous prime is 28198099. The next prime is 28198103. The reversal of 28198101 is 10189182.

It is an interprime number because it is at equal distance from previous prime (28198099) and next prime (28198103).

It is not a de Polignac number, because 28198101 - 2¹ = 28198099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28198103) 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 15 ways as a sum of consecutive naturals, for example, 88795 + ... + 89111.

It is an arithmetic number, because the mean of its divisors is an integer number (2385000).

Almost surely, 2^28198101 is an apocalyptic number.

It is an amenable number.

28198101 is a deficient number, since it is larger than the sum of its proper divisors (9961899).

28198101 is a wasteful number, since it uses less digits than its factorization.

28198101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 28198101 is about 5310.1884147363. The cubic root of 28198101 is about 304.3733474212.

The spelling of 28198101 in words is "twenty-eight million, one hundred ninety-eight thousand, one hundred one".