1115618428 has 12 divisors (see below), whose sum is σ = 1965436200. Its totient is φ = 554065232.

The previous prime is 1115618393. The next prime is 1115618431. The reversal of 1115618428 is 8248165111.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 935326 + ... + 936517.

It is an arithmetic number, because the mean of its divisors is an integer number (163786350).

Almost surely, 2^1115618428 is an apocalyptic number.

It is an amenable number.

1115618428 is a deficient number, since it is larger than the sum of its proper divisors (849817772).

1115618428 is a wasteful number, since it uses less digits than its factorization.

1115618428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871996 (or 1871994 counting only the distinct ones).

The product of its digits is 15360, while the sum is 37.

The square root of 1115618428 is about 33400.8746592062. The cubic root of 1115618428 is about 1037.1428072756.

It can be divided in two parts, 11156 and 18428, that added together give a square (29584 = 172²).

The spelling of 1115618428 in words is "one billion, one hundred fifteen million, six hundred eighteen thousand, four hundred twenty-eight".