2278981999 has 8 divisors (see below), whose sum is σ = 2741632640. Its totient is φ = 1850601816.

The previous prime is 2278981993. The next prime is 2278982009. The reversal of 2278981999 is 9991898722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2278981999 - 2⁹ = 2278981487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2278981999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278981993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8567469 + ... + 8567734.

It is an arithmetic number, because the mean of its divisors is an integer number (342704080).

Almost surely, 2^2278981999 is an apocalyptic number.

2278981999 is a deficient number, since it is larger than the sum of its proper divisors (462650641).

2278981999 is a wasteful number, since it uses less digits than its factorization.

2278981999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17135229.

The product of its digits is 11757312, while the sum is 64.

The square root of 2278981999 is about 47738.6845126675. The cubic root of 2278981999 is about 1315.9729577426.

The spelling of 2278981999 in words is "two billion, two hundred seventy-eight million, nine hundred eighty-one thousand, nine hundred ninety-nine".