72818 has 8 divisors (see below), whose sum is σ = 114048. Its totient is φ = 34804.

The previous prime is 72817. The next prime is 72823. The reversal of 72818 is 81827.

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

It is a super-2 number, since 2×72818² = 10604922248, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72817) 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, 746 + ... + 837.

It is an arithmetic number, because the mean of its divisors is an integer number (14256).

2⁷²⁸¹⁸ is an apocalyptic number.

72818 is a deficient number, since it is larger than the sum of its proper divisors (41230).

72818 is a wasteful number, since it uses less digits than its factorization.

72818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608.

The product of its digits is 896, while the sum is 26.

The square root of 72818 is about 269.8481054223. The cubic root of 72818 is about 41.7586306515.

Subtracting 72818 from its reverse (81827), we obtain a palindrome (9009).

The spelling of 72818 in words is "seventy-two thousand, eight hundred eighteen".