2278745918 has 8 divisors (see below), whose sum is σ = 3482611848. Its totient is φ = 1117875304.

The previous prime is 2278745891. The next prime is 2278745927. The reversal of 2278745918 is 8195478722.

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

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a self number, because there is not a number n which added to its sum of digits gives 2278745918.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10748696 + ... + 10748907.

It is an arithmetic number, because the mean of its divisors is an integer number (435326481).

Almost surely, 2^2278745918 is an apocalyptic number.

2278745918 is a deficient number, since it is larger than the sum of its proper divisors (1203865930).

2278745918 is a wasteful number, since it uses less digits than its factorization.

2278745918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21497658.

The product of its digits is 2257920, while the sum is 53.

The square root of 2278745918 is about 47736.2118103228. The cubic root of 2278745918 is about 1315.9275153857.

The spelling of 2278745918 in words is "two billion, two hundred seventy-eight million, seven hundred forty-five thousand, nine hundred eighteen".