28880840406 has 16 divisors (see below), whose sum is σ = 63012742848. Its totient is φ = 8751769800.

The previous prime is 28880840333. The next prime is 28880840413. The reversal of 28880840406 is 60404808882.

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, 218794180 + ... + 218794311.

It is an arithmetic number, because the mean of its divisors is an integer number (3938296428).

Almost surely, 2^28880840406 is an apocalyptic number.

28880840406 is an abundant number, since it is smaller than the sum of its proper divisors (34131902442).

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

28880840406 is a wasteful number, since it uses less digits than its factorization.

28880840406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437588507.

The product of its (nonzero) digits is 786432, while the sum is 48.

The spelling of 28880840406 in words is "twenty-eight billion, eight hundred eighty million, eight hundred forty thousand, four hundred six".