28033280778108 has 24 divisors (see below), whose sum is σ = 65469548037712. Its totient is φ = 9336061275264.

The previous prime is 28033280778073. The next prime is 28033280778133. The reversal of 28033280778108 is 80187708233082.

It is a congruent number.

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, 1045692385 + ... + 1045719192.

Almost surely, 2^{28033280778108} is an apocalyptic number.

It is an amenable number.

28033280778108 is an abundant number, since it is smaller than the sum of its proper divisors (37436267259604).

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

28033280778108 is a wasteful number, since it uses less digits than its factorization.

28033280778108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091412701 (or 2091412699 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 57.

The spelling of 28033280778108 in words is "twenty-eight trillion, thirty-three billion, two hundred eighty million, seven hundred seventy-eight thousand, one hundred eight".