1116388905 has 8 divisors (see below), whose sum is σ = 1786222272. Its totient is φ = 595407408.

The previous prime is 1116388891. The next prime is 1116388939. The reversal of 1116388905 is 5098836111.

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

It is not a de Polignac number, because 1116388905 - 2⁸ = 1116388649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37212949 + ... + 37212978.

It is an arithmetic number, because the mean of its divisors is an integer number (223277784).

Almost surely, 2^1116388905 is an apocalyptic number.

1116388905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1116388905 is a deficient number, since it is larger than the sum of its proper divisors (669833367).

1116388905 is an equidigital number, since it uses as much as digits as its factorization.

1116388905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74425935.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 1116388905 is about 33412.4064532922. The cubic root of 1116388905 is about 1037.3815121859.

The spelling of 1116388905 in words is "one billion, one hundred sixteen million, three hundred eighty-eight thousand, nine hundred five".