646532 has 24 divisors (see below), whose sum is σ = 1223040. Its totient is φ = 298080.

The previous prime is 646523. The next prime is 646537. The reversal of 646532 is 235646.

646532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 646532.

It is not an unprimeable number, because it can be changed into a prime (646537) by changing a digit.

646532 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 7 ways as a sum of consecutive naturals, for example, 3482 + ... + 3662.

It is an arithmetic number, because the mean of its divisors is an integer number (50960).

2⁶⁴⁶⁵³² is an apocalyptic number.

It is an amenable number.

646532 is a deficient number, since it is larger than the sum of its proper divisors (576508).

646532 is a wasteful number, since it uses less digits than its factorization.

646532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 249 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 646532 is about 804.0721360674. The cubic root of 646532 is about 86.4695784409.

The spelling of 646532 in words is "six hundred forty-six thousand, five hundred thirty-two".