28621730160 has 320 divisors, whose sum is σ = 100596418560. Its totient is φ = 7478231040.

The previous prime is 28621730149. The next prime is 28621730161. The reversal of 28621730160 is 6103712682.

28621730160 is a `hidden beast` number, since 2 + 86 + 217 + 301 + 60 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28621730161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29597997 + ... + 29598963.

It is an arithmetic number, because the mean of its divisors is an integer number (314363808).

Almost surely, 2^28621730160 is an apocalyptic number.

28621730160 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 28621730160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50298209280).

28621730160 is an abundant number, since it is smaller than the sum of its proper divisors (71974688400).

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

28621730160 is a wasteful number, since it uses less digits than its factorization.

28621730160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253 (or 1241 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 28621730160 in words is "twenty-eight billion, six hundred twenty-one million, seven hundred thirty thousand, one hundred sixty".