28133766078 has 64 divisors (see below), whose sum is σ = 62076672000. Its totient is φ = 8429535360.

The previous prime is 28133766077. The next prime is 28133766103. The reversal of 28133766078 is 87066733182.

It is a self number, because there is not a number n which added to its sum of digits gives 28133766078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133766077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2186568 + ... + 2199396.

It is an arithmetic number, because the mean of its divisors is an integer number (969948000).

Almost surely, 2^28133766078 is an apocalyptic number.

28133766078 is an abundant number, since it is smaller than the sum of its proper divisors (33942905922).

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

28133766078 is a wasteful number, since it uses less digits than its factorization.

28133766078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13217.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 28133766078 in words is "twenty-eight billion, one hundred thirty-three million, seven hundred sixty-six thousand, seventy-eight".