28178572206 has 16 divisors (see below), whose sum is σ = 56456197200. Its totient is φ = 9376348608.

The previous prime is 28178572109. The next prime is 28178572237. The reversal of 28178572206 is 60227587182.

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, 4123501 + ... + 4130328.

It is an arithmetic number, because the mean of its divisors is an integer number (3528512325).

Almost surely, 2^28178572206 is an apocalyptic number.

28178572206 is an abundant number, since it is smaller than the sum of its proper divisors (28277624994).

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

28178572206 is a wasteful number, since it uses less digits than its factorization.

28178572206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8254403.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 28178572206 in words is "twenty-eight billion, one hundred seventy-eight million, five hundred seventy-two thousand, two hundred six".