28774227870 has 96 divisors (see below), whose sum is σ = 76663521792. Its totient is φ = 7483847616.

The previous prime is 28774227857. The next prime is 28774227871. The reversal of 28774227870 is 7872247782.

28774227870 is a `hidden beast` number, since 2 + 87 + 7 + 422 + 78 + 70 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28774227871) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2870407 + ... + 2880413.

It is an arithmetic number, because the mean of its divisors is an integer number (798578352).

Almost surely, 2^28774227870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28774227870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38331760896).

28774227870 is an abundant number, since it is smaller than the sum of its proper divisors (47889293922).

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

28774227870 is a wasteful number, since it uses less digits than its factorization.

28774227870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10806 (or 10803 counting only the distinct ones).

The product of its (nonzero) digits is 4917248, while the sum is 54.

The spelling of 28774227870 in words is "twenty-eight billion, seven hundred seventy-four million, two hundred twenty-seven thousand, eight hundred seventy".