2278530018 has 18 divisors (see below), whose sum is σ = 4937253867. Its totient is φ = 759442500.

The previous prime is 2278530017. The next prime is 2278530019. The reversal of 2278530018 is 8100358722.

It is an interprime number because it is at equal distance from previous prime (2278530017) and next prime (2278530019).

It can be written as a sum of positive squares in only one way, i.e., 1139265009 + 1139265009 = 33753^2 + 33753^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=33753.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2278530013) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 196893 + ... + 208143.

Almost surely, 2^2278530018 is an apocalyptic number.

2278530018 is an abundant number, since it is smaller than the sum of its proper divisors (2658723849).

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

2278530018 is an frugal number, since it uses more digits than its factorization.

2278530018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22510 (or 11256 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 2278530018 is about 47733.9503707791. The cubic root of 2278530018 is about 1315.8859548470.

The spelling of 2278530018 in words is "two billion, two hundred seventy-eight million, five hundred thirty thousand, eighteen".