28166443998 has 32 divisors (see below), whose sum is σ = 70233212160. Its totient is φ = 7315959360.

The previous prime is 28166443957. The next prime is 28166444041. The reversal of 28166443998 is 89934466182.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30482703 + ... + 30483626.

It is an arithmetic number, because the mean of its divisors is an integer number (2194787880).

Almost surely, 2^28166443998 is an apocalyptic number.

28166443998 is an abundant number, since it is smaller than the sum of its proper divisors (42066768162).

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

28166443998 is a wasteful number, since it uses less digits than its factorization.

28166443998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60966352.

The product of its digits is 17915904, while the sum is 60.

The spelling of 28166443998 in words is "twenty-eight billion, one hundred sixty-six million, four hundred forty-three thousand, nine hundred ninety-eight".