28680442626 has 64 divisors (see below), whose sum is σ = 64534732416. Its totient is φ = 8420889600.

The previous prime is 28680442613. The next prime is 28680442657. The reversal of 28680442626 is 62624408682.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 564156 + ... + 612888.

It is an arithmetic number, because the mean of its divisors is an integer number (1008355194).

Almost surely, 2^28680442626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28680442626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32267366208).

28680442626 is an abundant number, since it is smaller than the sum of its proper divisors (35854289790).

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

28680442626 is a wasteful number, since it uses less digits than its factorization.

28680442626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49027.

The product of its (nonzero) digits is 1769472, while the sum is 48.

The spelling of 28680442626 in words is "twenty-eight billion, six hundred eighty million, four hundred forty-two thousand, six hundred twenty-six".