646268 has 12 divisors (see below), whose sum is σ = 1292592. Its totient is φ = 276960.

The previous prime is 646267. The next prime is 646271. The reversal of 646268 is 862646.

It is a happy number.

646268 is an admirable number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646267) 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, 11513 + ... + 11568.

It is an arithmetic number, because the mean of its divisors is an integer number (107716).

2⁶⁴⁶²⁶⁸ is an apocalyptic number.

It is an amenable number.

646268 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

646268 is a wasteful number, since it uses less digits than its factorization.

646268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23092 (or 23090 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 646268 is about 803.9079549302. The cubic root of 646268 is about 86.4578073935.

The spelling of 646268 in words is "six hundred forty-six thousand, two hundred sixty-eight".