28609276806 has 192 divisors, whose sum is σ = 70178524416. Its totient is φ = 8350617600.

The previous prime is 28609276769. The next prime is 28609276837. The reversal of 28609276806 is 60867290682.

28609276806 is a `hidden beast` number, since 2 + 8 + 609 + 27 + 6 + 8 + 0 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 208826770 + ... + 208826906.

It is an arithmetic number, because the mean of its divisors is an integer number (365513148).

Almost surely, 2^28609276806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28609276806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35089262208).

28609276806 is an abundant number, since it is smaller than the sum of its proper divisors (41569247610).

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

28609276806 is a wasteful number, since it uses less digits than its factorization.

28609276806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 28609276806 in words is "twenty-eight billion, six hundred nine million, two hundred seventy-six thousand, eight hundred six".