646894 has 8 divisors (see below), whose sum is σ = 976248. Its totient is φ = 321480.

The previous prime is 646889. The next prime is 646897. The reversal of 646894 is 498646.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646897) 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, 532 + ... + 1255.

It is an arithmetic number, because the mean of its divisors is an integer number (122031).

2⁶⁴⁶⁸⁹⁴ is an apocalyptic number.

646894 is a deficient number, since it is larger than the sum of its proper divisors (329354).

646894 is a wasteful number, since it uses less digits than its factorization.

646894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970.

The product of its digits is 41472, while the sum is 37.

The square root of 646894 is about 804.2972087481. The cubic root of 646894 is about 86.4857138357.

It can be divided in two parts, 646 and 894, that added together give a triangular number (1540 = T₅₅).

The spelling of 646894 in words is "six hundred forty-six thousand, eight hundred ninety-four".