28206445808 has 40 divisors (see below), whose sum is σ = 56046078000. Its totient is φ = 13744410624.

The previous prime is 28206445783. The next prime is 28206445831. The reversal of 28206445808 is 80854460282.

It is a happy number.

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, 263258 + ... + 354566.

It is an arithmetic number, because the mean of its divisors is an integer number (1401151950).

Almost surely, 2^28206445808 is an apocalyptic number.

It is an amenable number.

28206445808 is a deficient number, since it is larger than the sum of its proper divisors (27839632192).

28206445808 is a wasteful number, since it uses less digits than its factorization.

28206445808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91809 (or 91803 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 47.

The spelling of 28206445808 in words is "twenty-eight billion, two hundred six million, four hundred forty-five thousand, eight hundred eight".