2785128223 has 4 divisors (see below), whose sum is σ = 2785330080. Its totient is φ = 2784926368.

The previous prime is 2785128221. The next prime is 2785128271. The reversal of 2785128223 is 3228215872.

2785128223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2785128223 - 2¹ = 2785128221 is a prime.

It is a super-2 number, since 2×2785128223² = 15513878437102275458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2785128221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78583 + ... + 108376.

It is an arithmetic number, because the mean of its divisors is an integer number (696332520).

Almost surely, 2^2785128223 is an apocalyptic number.

2785128223 is a deficient number, since it is larger than the sum of its proper divisors (201857).

2785128223 is a wasteful number, since it uses less digits than its factorization.

2785128223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201856.

The product of its digits is 107520, while the sum is 40.

The square root of 2785128223 is about 52774.3140457553. The cubic root of 2785128223 is about 1406.9599378855.

The spelling of 2785128223 in words is "two billion, seven hundred eighty-five million, one hundred twenty-eight thousand, two hundred twenty-three".