28189647000 has 256 divisors, whose sum is σ = 99189043200. Its totient is φ = 7404566400.

The previous prime is 28189646977. The next prime is 28189647001. The reversal of 28189647000 is 74698182.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28189647001) 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, 1801209 + ... + 1816791.

It is an arithmetic number, because the mean of its divisors is an integer number (387457200).

Almost surely, 2^28189647000 is an apocalyptic number.

28189647000 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 28189647000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49594521600).

28189647000 is an abundant number, since it is smaller than the sum of its proper divisors (70999396200).

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

28189647000 is a wasteful number, since it uses less digits than its factorization.

28189647000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15680 (or 15660 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 28189647000 in words is "twenty-eight billion, one hundred eighty-nine million, six hundred forty-seven thousand".