1166881838 has 8 divisors (see below), whose sum is σ = 1751485680. Its totient is φ = 583053280.

The previous prime is 1166881829. The next prime is 1166881843. The reversal of 1166881838 is 8381886611.

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

It is a super-2 number, since 2×1166881838² = 2723226447708516488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190043 + ... + 196086.

It is an arithmetic number, because the mean of its divisors is an integer number (218935710).

Almost surely, 2^1166881838 is an apocalyptic number.

1166881838 is a deficient number, since it is larger than the sum of its proper divisors (584603842).

1166881838 is a wasteful number, since it uses less digits than its factorization.

1166881838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387642.

The product of its digits is 442368, while the sum is 50.

The square root of 1166881838 is about 34159.6521937797. The cubic root of 1166881838 is about 1052.7913146556.

The spelling of 1166881838 in words is "one billion, one hundred sixty-six million, eight hundred eighty-one thousand, eight hundred thirty-eight".