28526671338 has 128 divisors (see below), whose sum is σ = 66751672320. Its totient is φ = 8045157120.

The previous prime is 28526671331. The next prime is 28526671361. The reversal of 28526671338 is 83317662582.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28526671331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6024820 + ... + 6029552.

It is an arithmetic number, because the mean of its divisors is an integer number (521497440).

Almost surely, 2^28526671338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28526671338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33375836160).

28526671338 is an abundant number, since it is smaller than the sum of its proper divisors (38225000982).

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

28526671338 is a wasteful number, since it uses less digits than its factorization.

28526671338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4892.

The product of its digits is 2903040, while the sum is 51.

The spelling of 28526671338 in words is "twenty-eight billion, five hundred twenty-six million, six hundred seventy-one thousand, three hundred thirty-eight".