82397218 has 8 divisors (see below), whose sum is σ = 123672348. Its totient is φ = 41173104.

The previous prime is 82397213. The next prime is 82397221. The reversal of 82397218 is 81279328.

It can be written as a sum of positive squares in 2 ways, for example, as 80156209 + 2241009 = 8953^2 + 1497^2 .

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 (82397213) 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, 8421 + ... + 15352.

Almost surely, 2^82397218 is an apocalyptic number.

82397218 is a deficient number, since it is larger than the sum of its proper divisors (41275130).

82397218 is a wasteful number, since it uses less digits than its factorization.

82397218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25508.

The product of its digits is 48384, while the sum is 40.

The square root of 82397218 is about 9077.2913360760. The cubic root of 82397218 is about 435.1485254920.

The spelling of 82397218 in words is "eighty-two million, three hundred ninety-seven thousand, two hundred eighteen".