18272258 has 8 divisors (see below), whose sum is σ = 28600128. Its totient is φ = 8738884.

The previous prime is 18272251. The next prime is 18272269. The reversal of 18272258 is 85227281.

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 (18272251) 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, 198566 + ... + 198657.

It is an arithmetic number, because the mean of its divisors is an integer number (3575016).

Almost surely, 2^18272258 is an apocalyptic number.

18272258 is a deficient number, since it is larger than the sum of its proper divisors (10327870).

18272258 is a wasteful number, since it uses less digits than its factorization.

18272258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397248.

The product of its digits is 17920, while the sum is 35.

The square root of 18272258 is about 4274.6061806908. The cubic root of 18272258 is about 263.3888622239.

The spelling of 18272258 in words is "eighteen million, two hundred seventy-two thousand, two hundred fifty-eight".