866434 has 8 divisors (see below), whose sum is σ = 1309968. Its totient is φ = 429780.

The previous prime is 866431. The next prime is 866443. The reversal of 866434 is 434668.

866434 = 7² + 8² + ... + 137².

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

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 866396 and 866405.

It is not an unprimeable number, because it can be changed into a prime (866431) 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, 1392 + ... + 1915.

It is an arithmetic number, because the mean of its divisors is an integer number (163746).

2⁸⁶⁶⁴³⁴ is an apocalyptic number.

866434 is a deficient number, since it is larger than the sum of its proper divisors (443534).

866434 is a wasteful number, since it uses less digits than its factorization.

866434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440.

The product of its digits is 13824, while the sum is 31.

The square root of 866434 is about 930.8243658177. The cubic root of 866434 is about 95.3334175536. Note that the first 3 decimals are identical.

The spelling of 866434 in words is "eight hundred sixty-six thousand, four hundred thirty-four".