2118280 has 16 divisors (see below), whose sum is σ = 4766220. Its totient is φ = 847296.

The previous prime is 2118269. The next prime is 2118283. The reversal of 2118280 is 828112.

It can be written as a sum of positive squares in 2 ways, for example, as 1779556 + 338724 = 1334^2 + 582^2 .

It is a super-2 number, since 2×2118280² = 8974220316800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2118283) 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, 26439 + ... + 26518.

2^2118280 is an apocalyptic number.

2118280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2118280 is an abundant number, since it is smaller than the sum of its proper divisors (2647940).

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

2118280 is a wasteful number, since it uses less digits than its factorization.

2118280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52968 (or 52964 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 2118280 is about 1455.4312075808. The cubic root of 2118280 is about 128.4284147606.

The spelling of 2118280 in words is "two million, one hundred eighteen thousand, two hundred eighty".