28336665368 has 128 divisors (see below), whose sum is σ = 61483968000. Its totient is φ = 12124062720.

The previous prime is 28336665361. The next prime is 28336665389. The reversal of 28336665368 is 86356663382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28336665361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17610548 + ... + 17612156.

It is an arithmetic number, because the mean of its divisors is an integer number (480343500).

Almost surely, 2^28336665368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28336665368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30741984000).

28336665368 is an abundant number, since it is smaller than the sum of its proper divisors (33147302632).

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

28336665368 is a wasteful number, since it uses less digits than its factorization.

28336665368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825 (or 1821 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 56.

The spelling of 28336665368 in words is "twenty-eight billion, three hundred thirty-six million, six hundred sixty-five thousand, three hundred sixty-eight".