28288787826 has 32 divisors (see below), whose sum is σ = 61004962368. Its totient is φ = 8693490240.

The previous prime is 28288787809. The next prime is 28288787837. The reversal of 28288787826 is 62878788282.

28288787826 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160341 + ... + 286856.

It is an arithmetic number, because the mean of its divisors is an integer number (1906405074).

Almost surely, 2^28288787826 is an apocalyptic number.

28288787826 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28288787826 is an abundant number, since it is smaller than the sum of its proper divisors (32716174542).

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

28288787826 is a wasteful number, since it uses less digits than its factorization.

28288787826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448026.

The product of its digits is 77070336, while the sum is 66.

The spelling of 28288787826 in words is "twenty-eight billion, two hundred eighty-eight million, seven hundred eighty-seven thousand, eight hundred twenty-six".