8191018 has 16 divisors (see below), whose sum is σ = 13605984. Its totient is φ = 3666960.

The previous prime is 8190997. The next prime is 8191049. The reversal of 8191018 is 8101918.

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, 1305 + ... + 4252.

It is an arithmetic number, because the mean of its divisors is an integer number (850374).

Almost surely, 2^8191018 is an apocalyptic number.

8191018 is a deficient number, since it is larger than the sum of its proper divisors (5414966).

8191018 is a wasteful number, since it uses less digits than its factorization.

8191018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5637.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 8191018 is about 2861.9954577183. The cubic root of 8191018 is about 201.5793126973.

The spelling of 8191018 in words is "eight million, one hundred ninety-one thousand, eighteen".