28287334278 has 96 divisors (see below), whose sum is σ = 70792001280. Its totient is φ = 7996294080.

The previous prime is 28287334253. The next prime is 28287334301. The reversal of 28287334278 is 87243378282.

28287334278 is a `hidden beast` number, since 2 + 8 + 287 + 334 + 27 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5374168 + ... + 5379428.

It is an arithmetic number, because the mean of its divisors is an integer number (737416680).

Almost surely, 2^28287334278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28287334278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35396000640).

28287334278 is an abundant number, since it is smaller than the sum of its proper divisors (42504667002).

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

28287334278 is a wasteful number, since it uses less digits than its factorization.

28287334278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5722 (or 5719 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 54.

The spelling of 28287334278 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred thirty-four thousand, two hundred seventy-eight".