28154851794 has 12 divisors (see below), whose sum is σ = 61002178926. Its totient is φ = 9384950592.

The previous prime is 28154851783. The next prime is 28154851799. The reversal of 28154851794 is 49715845182.

28154851794 is a `hidden beast` number, since 2 + 8 + 1 + 548 + 5 + 1 + 7 + 94 = 666.

28154851794 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 14783398569 + 13371453225 = 121587^2 + 115635^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28154851794.

It is not an unprimeable number, because it can be changed into a prime (28154851799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 782079199 + ... + 782079234.

Almost surely, 2^28154851794 is an apocalyptic number.

28154851794 is an abundant number, since it is smaller than the sum of its proper divisors (32847327132).

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

28154851794 is a wasteful number, since it uses less digits than its factorization.

28154851794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564158441 (or 1564158438 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The spelling of 28154851794 in words is "twenty-eight billion, one hundred fifty-four million, eight hundred fifty-one thousand, seven hundred ninety-four".