28327825778 has 16 divisors (see below), whose sum is σ = 49691336640. Its totient is φ = 11858159376.

The previous prime is 28327825663. The next prime is 28327825783. The reversal of 28327825778 is 87752872382.

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, 23527493 + ... + 23528696.

It is an arithmetic number, because the mean of its divisors is an integer number (3105708540).

Almost surely, 2^28327825778 is an apocalyptic number.

28327825778 is a deficient number, since it is larger than the sum of its proper divisors (21363510862).

28327825778 is a wasteful number, since it uses less digits than its factorization.

28327825778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47056241.

The product of its digits is 21073920, while the sum is 59.

The spelling of 28327825778 in words is "twenty-eight billion, three hundred twenty-seven million, eight hundred twenty-five thousand, seven hundred seventy-eight".