28126431608 has 96 divisors (see below), whose sum is σ = 60248361600. Its totient is φ = 12285799680.

The previous prime is 28126431583. The next prime is 28126431647. The reversal of 28126431608 is 80613462182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6257810 + ... + 6262302.

It is an arithmetic number, because the mean of its divisors is an integer number (627587100).

Almost surely, 2^28126431608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28126431608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30124180800).

28126431608 is an abundant number, since it is smaller than the sum of its proper divisors (32121929992).

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

28126431608 is a wasteful number, since it uses less digits than its factorization.

28126431608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4773 (or 4758 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 28126431608 in words is "twenty-eight billion, one hundred twenty-six million, four hundred thirty-one thousand, six hundred eight".