28157108226 has 32 divisors (see below), whose sum is σ = 60674506368. Its totient is φ = 8659664640.

The previous prime is 28157108201. The next prime is 28157108227. The reversal of 28157108226 is 62280175182.

It is not an unprimeable number, because it can be changed into a prime (28157108227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85035 + ... + 252081.

It is an arithmetic number, because the mean of its divisors is an integer number (1896078324).

Almost surely, 2^28157108226 is an apocalyptic number.

28157108226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28157108226 is an abundant number, since it is smaller than the sum of its proper divisors (32517398142).

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

28157108226 is a wasteful number, since it uses less digits than its factorization.

28157108226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169226.

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 28157108226 in words is "twenty-eight billion, one hundred fifty-seven million, one hundred eight thousand, two hundred twenty-six".