28625106978 has 48 divisors (see below), whose sum is σ = 66816509760. Its totient is φ = 8804482272.

The previous prime is 28625106973. The next prime is 28625107013. The reversal of 28625106978 is 87960152682.

28625106978 is a `hidden beast` number, since 2 + 8 + 62 + 510 + 69 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (28625106973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 658233 + ... + 700371.

It is an arithmetic number, because the mean of its divisors is an integer number (1392010620).

Almost surely, 2^28625106978 is an apocalyptic number.

28625106978 is an abundant number, since it is smaller than the sum of its proper divisors (38191402782).

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

28625106978 is a wasteful number, since it uses less digits than its factorization.

28625106978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45063 (or 45060 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 28625106978 in words is "twenty-eight billion, six hundred twenty-five million, one hundred six thousand, nine hundred seventy-eight".