28644578796 has 24 divisors (see below), whose sum is σ = 66868686640. Its totient is φ = 9543716352.

The previous prime is 28644578779. The next prime is 28644578827. The reversal of 28644578796 is 69787544682.

It is a happy 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, 532861 + ... + 584148.

Almost surely, 2^28644578796 is an apocalyptic number.

It is an amenable number.

28644578796 is an abundant number, since it is smaller than the sum of its proper divisors (38224107844).

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

28644578796 is a wasteful number, since it uses less digits than its factorization.

28644578796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119153 (or 1119151 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 66.

The spelling of 28644578796 in words is "twenty-eight billion, six hundred forty-four million, five hundred seventy-eight thousand, seven hundred ninety-six".