28175718240 has 384 divisors, whose sum is σ = 101565757440. Its totient is φ = 7290777600.

The previous prime is 28175718191. The next prime is 28175718253. The reversal of 28175718240 is 4281757182.

28175718240 is a `hidden beast` number, since 28 + 17 + 571 + 8 + 2 + 40 = 666.

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 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 63 ways as a sum of consecutive naturals, for example, 47999227 + ... + 47999813.

It is an arithmetic number, because the mean of its divisors is an integer number (264494160).

Almost surely, 2^28175718240 is an apocalyptic number.

28175718240 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 28175718240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50782878720).

28175718240 is an abundant number, since it is smaller than the sum of its proper divisors (73390039200).

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

28175718240 is a wasteful number, since it uses less digits than its factorization.

28175718240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 28175718240 in words is "twenty-eight billion, one hundred seventy-five million, seven hundred eighteen thousand, two hundred forty".