856418 has 8 divisors (see below), whose sum is σ = 1288812. Its totient is φ = 426816.

The previous prime is 856417. The next prime is 856421. The reversal of 856418 is 814658.

It can be written as a sum of positive squares in 2 ways, for example, as 851929 + 4489 = 923^2 + 67^2 .

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 (856411) 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, 446 + ... + 1382.

2⁸⁵⁶⁴¹⁸ is an apocalyptic number.

856418 is a deficient number, since it is larger than the sum of its proper divisors (432394).

856418 is a wasteful number, since it uses less digits than its factorization.

856418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396.

The product of its digits is 7680, while the sum is 32.

The square root of 856418 is about 925.4285493759. The cubic root of 856418 is about 94.9646405803.

The spelling of 856418 in words is "eight hundred fifty-six thousand, four hundred eighteen".