28078764716 has 12 divisors (see below), whose sum is σ = 49143842832. Its totient is φ = 14037666768.

The previous prime is 28078764709. The next prime is 28078764739. The reversal of 28078764716 is 61746787082.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391715 + ... + 457818.

It is an arithmetic number, because the mean of its divisors is an integer number (4095320236).

Almost surely, 2^28078764716 is an apocalyptic number.

It is an amenable number.

28078764716 is a deficient number, since it is larger than the sum of its proper divisors (21065078116).

28078764716 is a wasteful number, since it uses less digits than its factorization.

28078764716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857800 (or 857798 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 56.

The spelling of 28078764716 in words is "twenty-eight billion, seventy-eight million, seven hundred sixty-four thousand, seven hundred sixteen".