2278185089 has 4 divisors (see below), whose sum is σ = 2290912560. Its totient is φ = 2265457620.

The previous prime is 2278185067. The next prime is 2278185137. The reversal of 2278185089 is 9805818722.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2278185089 - 2²⁰ = 2277136513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2278185059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6363467 + ... + 6363824.

It is an arithmetic number, because the mean of its divisors is an integer number (572728140).

Almost surely, 2^2278185089 is an apocalyptic number.

It is an amenable number.

2278185089 is a deficient number, since it is larger than the sum of its proper divisors (12727471).

2278185089 is a wasteful number, since it uses less digits than its factorization.

2278185089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12727470.

The product of its (nonzero) digits is 645120, while the sum is 50.

The square root of 2278185089 is about 47730.3371976356. The cubic root of 2278185089 is about 1315.8195509041.

The spelling of 2278185089 in words is "two billion, two hundred seventy-eight million, one hundred eighty-five thousand, eighty-nine".