28206258894 has 48 divisors (see below), whose sum is σ = 68295440304. Its totient is φ = 8338876800.

The previous prime is 28206258851. The next prime is 28206258911. The reversal of 28206258894 is 49885260282.

It is a happy number.

28206258894 is a `hidden beast` number, since 2 + 8 + 2 + 0 + 625 + 8 + 8 + 9 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28206258894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1729149 + ... + 1745384.

It is an arithmetic number, because the mean of its divisors is an integer number (1422821673).

Almost surely, 2^28206258894 is an apocalyptic number.

28206258894 is an abundant number, since it is smaller than the sum of its proper divisors (40089181410).

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

28206258894 is a wasteful number, since it uses less digits than its factorization.

28206258894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474593 (or 3474590 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 28206258894 in words is "twenty-eight billion, two hundred six million, two hundred fifty-eight thousand, eight hundred ninety-four".