218494 has 8 divisors (see below), whose sum is σ = 331128. Its totient is φ = 108120.

The previous prime is 218479. The next prime is 218509. The reversal of 218494 is 494812.

It is an interprime number because it is at equal distance from previous prime (218479) and next prime (218509).

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

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297 + ... + 724.

It is an arithmetic number, because the mean of its divisors is an integer number (41391).

2²¹⁸⁴⁹⁴ is an apocalyptic number.

218494 is a deficient number, since it is larger than the sum of its proper divisors (112634).

218494 is a wasteful number, since it uses less digits than its factorization.

218494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130.

The product of its digits is 2304, while the sum is 28.

The square root of 218494 is about 467.4334177185. The cubic root of 218494 is about 60.2300428039.

It can be divided in two parts, 2184 and 94, that added together give a triangular number (2278 = T₆₇).

The spelling of 218494 in words is "two hundred eighteen thousand, four hundred ninety-four".