2118563028 has 72 divisors (see below), whose sum is σ = 5599129536. Its totient is φ = 674150400.

The previous prime is 2118563009. The next prime is 2118563053. The reversal of 2118563028 is 8203658112.

It is a happy number.

2118563028 is a `hidden beast` number, since 2 + 1 + 18 + 5 + 630 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2118562983 and 2118563001.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 470548 + ... + 475028.

It is an arithmetic number, because the mean of its divisors is an integer number (77765688).

Almost surely, 2^2118563028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2118563028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2799564768).

2118563028 is an abundant number, since it is smaller than the sum of its proper divisors (3480566508).

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

2118563028 is a wasteful number, since it uses less digits than its factorization.

2118563028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5085 (or 5080 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 2118563028 is about 46027.8505689762. The cubic root of 2118563028 is about 1284.3413437253.

The spelling of 2118563028 in words is "two billion, one hundred eighteen million, five hundred sixty-three thousand, twenty-eight".