2118815428 has 6 divisors (see below), whose sum is σ = 3707927006. Its totient is φ = 1059407712.

The previous prime is 2118815399. The next prime is 2118815431. The reversal of 2118815428 is 8245188112.

It can be written as a sum of positive squares in only one way, i.e., 2116736064 + 2079364 = 46008^2 + 1442^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264851925 + ... + 264851932.

Almost surely, 2^2118815428 is an apocalyptic number.

It is an amenable number.

2118815428 is a deficient number, since it is larger than the sum of its proper divisors (1589111578).

2118815428 is a wasteful number, since it uses less digits than its factorization.

2118815428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529703861 (or 529703859 counting only the distinct ones).

The product of its digits is 40960, while the sum is 40.

The square root of 2118815428 is about 46030.5923055526. The cubic root of 2118815428 is about 1284.3923460444.

The spelling of 2118815428 in words is "two billion, one hundred eighteen million, eight hundred fifteen thousand, four hundred twenty-eight".