28599722064 has 180 divisors, whose sum is σ = 85424401660. Its totient is φ = 8930304000.

The previous prime is 28599722029. The next prime is 28599722069. The reversal of 28599722064 is 46022799582.

28599722064 is a `hidden beast` number, since 28 + 599 + 7 + 2 + 20 + 6 + 4 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 8447080464 + 20152641600 = 91908^2 + 141960^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28599722064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28599722069) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 9528564 + ... + 9531564.

Almost surely, 2^28599722064 is an apocalyptic number.

28599722064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28599722064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42712200830).

28599722064 is an abundant number, since it is smaller than the sum of its proper divisors (56824679596).

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

28599722064 is a wasteful number, since it uses less digits than its factorization.

28599722064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278 (or 3252 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 28599722064 in words is "twenty-eight billion, five hundred ninety-nine million, seven hundred twenty-two thousand, sixty-four".