28255951278 has 32 divisors (see below), whose sum is σ = 64251264000. Its totient is φ = 9199611288.

The previous prime is 28255951267. The next prime is 28255951303. The reversal of 28255951278 is 87215955282.

28255951278 is a `hidden beast` number, since 2 + 8 + 2 + 5 + 59 + 512 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6082078 + ... + 6086721.

It is an arithmetic number, because the mean of its divisors is an integer number (2007852000).

Almost surely, 2^28255951278 is an apocalyptic number.

28255951278 is an abundant number, since it is smaller than the sum of its proper divisors (35995312722).

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

28255951278 is a wasteful number, since it uses less digits than its factorization.

28255951278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12168853 (or 12168847 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 54.

The spelling of 28255951278 in words is "twenty-eight billion, two hundred fifty-five million, nine hundred fifty-one thousand, two hundred seventy-eight".