646752 has 24 divisors (see below), whose sum is σ = 1697976. Its totient is φ = 215552.

The previous prime is 646721. The next prime is 646757. The reversal of 646752 is 257646.

646752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646757) by changing a digit.

646752 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, 3273 + ... + 3464.

It is an arithmetic number, because the mean of its divisors is an integer number (70749).

2⁶⁴⁶⁷⁵² is an apocalyptic number.

It is an amenable number.

646752 is an abundant number, since it is smaller than the sum of its proper divisors (1051224).

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

646752 is a wasteful number, since it uses less digits than its factorization.

646752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6750 (or 6742 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 646752 is about 804.2089280778. The cubic root of 646752 is about 86.4793851996.

The spelling of 646752 in words is "six hundred forty-six thousand, seven hundred fifty-two".