28025750778050 has 24 divisors (see below), whose sum is σ = 52128076072116. Its totient is φ = 11210261682240.

The previous prime is 28025750778029. The next prime is 28025750778061. The reversal of 28025750778050 is 5087705752082.

It can be written as a sum of positive squares in 6 ways, for example, as 5808018060289 + 22217732717761 = 2409983^2 + 4713569^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16997984 + ... + 18573716.

Almost surely, 2^{28025750778050} is an apocalyptic number.

28025750778050 is a deficient number, since it is larger than the sum of its proper divisors (24102325294066).

28025750778050 is a wasteful number, since it uses less digits than its factorization.

28025750778050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931462 (or 1931457 counting only the distinct ones).

The product of its (nonzero) digits is 10976000, while the sum is 56.

The spelling of 28025750778050 in words is "twenty-eight trillion, twenty-five billion, seven hundred fifty million, seven hundred seventy-eight thousand, fifty".