646846 has 8 divisors (see below), whose sum is σ = 1001664. Its totient is φ = 312960.

The previous prime is 646843. The next prime is 646859. The reversal of 646846 is 648646.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646843) 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, 5155 + ... + 5278.

It is an arithmetic number, because the mean of its divisors is an integer number (125208).

2⁶⁴⁶⁸⁴⁶ is an apocalyptic number.

646846 is a deficient number, since it is larger than the sum of its proper divisors (354818).

646846 is a wasteful number, since it uses less digits than its factorization.

646846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10466.

The product of its digits is 27648, while the sum is 34.

The square root of 646846 is about 804.2673684789. The cubic root of 646846 is about 86.4835746820.

The spelling of 646846 in words is "six hundred forty-six thousand, eight hundred forty-six".