28316108778 has 16 divisors (see below), whose sum is σ = 56638836576. Its totient is φ = 9437599760.

The previous prime is 28316108761. The next prime is 28316108783. The reversal of 28316108778 is 87780161382.

It is a self number, because there is not a number n which added to its sum of digits gives 28316108778.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219288 + ... + 323603.

It is an arithmetic number, because the mean of its divisors is an integer number (3539927286).

Almost surely, 2^28316108778 is an apocalyptic number.

28316108778 is an abundant number, since it is smaller than the sum of its proper divisors (28322727798).

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

28316108778 is a wasteful number, since it uses less digits than its factorization.

28316108778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551589.

The product of its (nonzero) digits is 903168, while the sum is 51.

The spelling of 28316108778 in words is "twenty-eight billion, three hundred sixteen million, one hundred eight thousand, seven hundred seventy-eight".