26857567828 has 48 divisors (see below), whose sum is σ = 57936985344. Its totient is φ = 10608456960.

The previous prime is 26857567771. The next prime is 26857567831. The reversal of 26857567828 is 82876575862.

It is a self number, because there is not a number n which added to its sum of digits gives 26857567828.

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 15 ways as a sum of consecutive naturals, for example, 178488 + ... + 292528.

It is an arithmetic number, because the mean of its divisors is an integer number (1207020528).

Almost surely, 2^26857567828 is an apocalyptic number.

26857567828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26857567828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28968492672).

26857567828 is an abundant number, since it is smaller than the sum of its proper divisors (31079417516).

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

26857567828 is a wasteful number, since it uses less digits than its factorization.

26857567828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114712 (or 114710 counting only the distinct ones).

The product of its digits is 90316800, while the sum is 64.

The spelling of 26857567828 in words is "twenty-six billion, eight hundred fifty-seven million, five hundred sixty-seven thousand, eight hundred twenty-eight".