1091115938 has 8 divisors (see below), whose sum is σ = 1785462480. Its totient is φ = 495961780.

The previous prime is 1091115937. The next prime is 1091115941. The reversal of 1091115938 is 8395111901.

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

It is not an unprimeable number, because it can be changed into a prime (1091115937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24798068 + ... + 24798111.

It is an arithmetic number, because the mean of its divisors is an integer number (223182810).

Almost surely, 2^1091115938 is an apocalyptic number.

1091115938 is a deficient number, since it is larger than the sum of its proper divisors (694346542).

1091115938 is a wasteful number, since it uses less digits than its factorization.

1091115938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49596192.

The product of its (nonzero) digits is 9720, while the sum is 38.

The square root of 1091115938 is about 33032.0441087136. The cubic root of 1091115938 is about 1029.4935575437.

The spelling of 1091115938 in words is "one billion, ninety-one million, one hundred fifteen thousand, nine hundred thirty-eight".