18340386 has 32 divisors (see below), whose sum is σ = 37739520. Its totient is φ = 5939664.

The previous prime is 18340373. The next prime is 18340391. The reversal of 18340386 is 68304381.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36211 + ... + 36713.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^18340386 is an apocalyptic number.

18340386 is an abundant number, since it is smaller than the sum of its proper divisors (19399134).

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

18340386 is a wasteful number, since it uses less digits than its factorization.

18340386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 18340386 is about 4282.5676877313. The cubic root of 18340386 is about 263.7158041363.

The spelling of 18340386 in words is "eighteen million, three hundred forty thousand, three hundred eighty-six".