28279143084 has 12 divisors (see below), whose sum is σ = 65984667224. Its totient is φ = 9426381024.

The previous prime is 28279143073. The next prime is 28279143089. The reversal of 28279143084 is 48034197282.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (28279143089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178297617 + ... + 1178297640.

Almost surely, 2^28279143084 is an apocalyptic number.

It is an amenable number.

28279143084 is an abundant number, since it is smaller than the sum of its proper divisors (37705524140).

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

28279143084 is a wasteful number, since it uses less digits than its factorization.

28279143084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356595264 (or 2356595262 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 28279143084 in words is "twenty-eight billion, two hundred seventy-nine million, one hundred forty-three thousand, eighty-four".