2118628 has 6 divisors (see below), whose sum is σ = 3707606. Its totient is φ = 1059312.

The previous prime is 2118601. The next prime is 2118629. The reversal of 2118628 is 8268112.

It can be written as a sum of positive squares in only one way, i.e., 1658944 + 459684 = 1288^2 + 678^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2118596 and 2118605.

It is not an unprimeable number, because it can be changed into a prime (2118629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264825 + ... + 264832.

2^2118628 is an apocalyptic number.

It is an amenable number.

2118628 is a deficient number, since it is larger than the sum of its proper divisors (1588978).

2118628 is a wasteful number, since it uses less digits than its factorization.

2118628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529661 (or 529659 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 2118628 is about 1455.5507548691. The cubic root of 2118628 is about 128.4354472966.

The spelling of 2118628 in words is "two million, one hundred eighteen thousand, six hundred twenty-eight".