1116421638 has 8 divisors (see below), whose sum is σ = 2232843288. Its totient is φ = 372140544.

The previous prime is 1116421619. The next prime is 1116421661. The reversal of 1116421638 is 8361246111.

It is a sphenic number, since it is the product of 3 distinct primes.

1116421638 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1116421599 and 1116421608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93035131 + ... + 93035142.

It is an arithmetic number, because the mean of its divisors is an integer number (279105411).

Almost surely, 2^1116421638 is an apocalyptic number.

1116421638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1116421638 is a wasteful number, since it uses less digits than its factorization.

1116421638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186070278.

The product of its digits is 6912, while the sum is 33.

The square root of 1116421638 is about 33412.8962827229. The cubic root of 1116421638 is about 1037.3916509100.

Adding to 1116421638 its reverse (8361246111), we get a palindrome (9477667749).

The spelling of 1116421638 in words is "one billion, one hundred sixteen million, four hundred twenty-one thousand, six hundred thirty-eight".