28500061680 has 160 divisors (see below), whose sum is σ = 98579404800. Its totient is φ = 7568080128.

The previous prime is 28500061679. The next prime is 28500061697. The reversal of 28500061680 is 8616000582.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 488637 + ... + 543843.

It is an arithmetic number, because the mean of its divisors is an integer number (616121280).

Almost surely, 2^28500061680 is an apocalyptic number.

28500061680 is a gapful number since it is divisible by the number (20) 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 28500061680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49289702400).

28500061680 is an abundant number, since it is smaller than the sum of its proper divisors (70079343120).

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

28500061680 is a wasteful number, since it uses less digits than its factorization.

28500061680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55468 (or 55456 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 28500061680 in words is "twenty-eight billion, five hundred million, sixty-one thousand, six hundred eighty".