28437198 has 16 divisors (see below), whose sum is σ = 57127680. Its totient is φ = 9436856.

The previous prime is 28437181. The next prime is 28437217. The reversal of 28437198 is 89173482.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9078 + ... + 11801.

It is an arithmetic number, because the mean of its divisors is an integer number (3570480).

Almost surely, 2^28437198 is an apocalyptic number.

28437198 is an abundant number, since it is smaller than the sum of its proper divisors (28690482).

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

28437198 is a wasteful number, since it uses less digits than its factorization.

28437198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21111.

The product of its digits is 96768, while the sum is 42.

The square root of 28437198 is about 5332.6539358935. The cubic root of 28437198 is about 305.2312069329.

The spelling of 28437198 in words is "twenty-eight million, four hundred thirty-seven thousand, one hundred ninety-eight".