18000458 has 8 divisors (see below), whose sum is σ = 30857952. Its totient is φ = 7714476.

The previous prime is 18000457. The next prime is 18000469. The reversal of 18000458 is 85400081.

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 (18000457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642860 + ... + 642887.

It is an arithmetic number, because the mean of its divisors is an integer number (3857244).

Almost surely, 2^18000458 is an apocalyptic number.

18000458 is a deficient number, since it is larger than the sum of its proper divisors (12857494).

18000458 is a wasteful number, since it uses less digits than its factorization.

18000458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285756.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 18000458 is about 4242.6946625936. The cubic root of 18000458 is about 262.0763621790.

The spelling of 18000458 in words is "eighteen million, four hundred fifty-eight", and thus it is an aban number.