8457818 has 8 divisors (see below), whose sum is σ = 12817812. Its totient is φ = 4185216.

The previous prime is 8457811. The next prime is 8457847. The reversal of 8457818 is 8187548.

It can be written as a sum of positive squares in 2 ways, for example, as 7327849 + 1129969 = 2707^2 + 1063^2 .

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

It is a super-2 number, since 2×8457818² = 143069370642248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8457811) 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, 21605 + ... + 21992.

Almost surely, 2^8457818 is an apocalyptic number.

8457818 is a deficient number, since it is larger than the sum of its proper divisors (4359994).

8457818 is a wasteful number, since it uses less digits than its factorization.

8457818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43696.

The product of its digits is 71680, while the sum is 41.

The square root of 8457818 is about 2908.2327967341. The cubic root of 8457818 is about 203.7446022131.

The spelling of 8457818 in words is "eight million, four hundred fifty-seven thousand, eight hundred eighteen".