646896 has 20 divisors (see below), whose sum is σ = 1671272. Its totient is φ = 215616.

The previous prime is 646889. The next prime is 646897. The reversal of 646896 is 698646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646897) by changing a digit.

646896 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6691 + ... + 6786.

2⁶⁴⁶⁸⁹⁶ is an apocalyptic number.

It is an amenable number.

646896 is an abundant number, since it is smaller than the sum of its proper divisors (1024376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646896 is a wasteful number, since it uses less digits than its factorization.

646896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13488 (or 13482 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 646896 is about 804.2984520686. The cubic root of 646896 is about 86.4858029648.

The spelling of 646896 in words is "six hundred forty-six thousand, eight hundred ninety-six".