28908522100 has 36 divisors (see below), whose sum is σ = 66421584684. Its totient is φ = 10883207680.

The previous prime is 28908522079. The next prime is 28908522113. The reversal of 28908522100 is 122580982.

It can be written as a sum of positive squares in 6 ways, for example, as 3322600164 + 25585921936 = 57642^2 + 159956^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28908522100.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 8500807 + ... + 8504206.

It is an arithmetic number, because the mean of its divisors is an integer number (1845044019).

Almost surely, 2^28908522100 is an apocalyptic number.

28908522100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28908522100 is an abundant number, since it is smaller than the sum of its proper divisors (37513062584).

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

28908522100 is a wasteful number, since it uses less digits than its factorization.

28908522100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17005044 (or 17005037 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 28908522100 in words is "twenty-eight billion, nine hundred eight million, five hundred twenty-two thousand, one hundred".