28445882718 has 64 divisors (see below), whose sum is σ = 65446318080. Its totient is φ = 8151775200.

The previous prime is 28445882711. The next prime is 28445882749. The reversal of 28445882718 is 81728854482.

It is a super-2 number, since 2×28445882718² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28445882711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 696171 + ... + 735897.

It is an arithmetic number, because the mean of its divisors is an integer number (1022598720).

Almost surely, 2^28445882718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28445882718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32723159040).

28445882718 is an abundant number, since it is smaller than the sum of its proper divisors (37000435362).

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

28445882718 is a wasteful number, since it uses less digits than its factorization.

28445882718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40333.

The product of its digits is 9175040, while the sum is 57.

The spelling of 28445882718 in words is "twenty-eight billion, four hundred forty-five million, eight hundred eighty-two thousand, seven hundred eighteen".