28321062156 has 96 divisors (see below), whose sum is σ = 74356531200. Its totient is φ = 9321105600.

The previous prime is 28321062101. The next prime is 28321062191. The reversal of 28321062156 is 65126012382.

28321062156 is a `hidden beast` number, since 2 + 8 + 3 + 21 + 0 + 621 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28321062156.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4174375 + ... + 4181153.

It is an arithmetic number, because the mean of its divisors is an integer number (774547200).

Almost surely, 2^28321062156 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 28321062156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37178265600).

28321062156 is an abundant number, since it is smaller than the sum of its proper divisors (46035469044).

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

28321062156 is a wasteful number, since it uses less digits than its factorization.

28321062156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276 (or 7268 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 28321062156 in words is "twenty-eight billion, three hundred twenty-one million, sixty-two thousand, one hundred fifty-six".