28378860256 has 24 divisors (see below), whose sum is σ = 58811455080. Its totient is φ = 13442617728.

The previous prime is 28378860221. The next prime is 28378860259. The reversal of 28378860256 is 65206887382.

It is a junction number, because it is equal to n+sod(n) for n = 28378860197 and 28378860206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28378860259) 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, 23337271 + ... + 23338486.

It is an arithmetic number, because the mean of its divisors is an integer number (2450477295).

Almost surely, 2^28378860256 is an apocalyptic number.

It is an amenable number.

28378860256 is an abundant number, since it is smaller than the sum of its proper divisors (30432594824).

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

28378860256 is a wasteful number, since it uses less digits than its factorization.

28378860256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46675786 (or 46675778 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 28378860256 in words is "twenty-eight billion, three hundred seventy-eight million, eight hundred sixty thousand, two hundred fifty-six".