28279533888 has 70 divisors (see below), whose sum is σ = 83829412986. Its totient is φ = 9426509568.

The previous prime is 28279533853. The next prime is 28279533901. The reversal of 28279533888 is 88833597282.

28279533888 is a `hidden beast` number, since 28 + 2 + 79 + 533 + 8 + 8 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27280468224 + 999065664 = 165168^2 + 31608^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2722395 + ... + 2732762.

Almost surely, 2^28279533888 is an apocalyptic number.

It is an amenable number.

28279533888 is an abundant number, since it is smaller than the sum of its proper divisors (55549879098).

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

28279533888 is an equidigital number, since it uses as much as digits as its factorization.

28279533888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455181 (or 5455162 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 28279533888 in words is "twenty-eight billion, two hundred seventy-nine million, five hundred thirty-three thousand, eight hundred eighty-eight".