2786775728 has 80 divisors (see below), whose sum is σ = 6339371040. Its totient is φ = 1172582400.

The previous prime is 2786775697. The next prime is 2786775767. The reversal of 2786775728 is 8275776872.

It is a super-2 number, since 2×2786775728² = 15532237916339859968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174878 + ... + 190146.

It is an arithmetic number, because the mean of its divisors is an integer number (79242138).

Almost surely, 2^2786775728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2786775728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3169685520).

2786775728 is an abundant number, since it is smaller than the sum of its proper divisors (3552595312).

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

2786775728 is a wasteful number, since it uses less digits than its factorization.

2786775728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15366 (or 15360 counting only the distinct ones).

The product of its digits is 18439680, while the sum is 59.

The square root of 2786775728 is about 52789.9207046194. The cubic root of 2786775728 is about 1407.2373059205.

The spelling of 2786775728 in words is "two billion, seven hundred eighty-six million, seven hundred seventy-five thousand, seven hundred twenty-eight".