646360 has 64 divisors (see below), whose sum is σ = 1723680. Its totient is φ = 215040.

The previous prime is 646339. The next prime is 646379. The reversal of 646360 is 63646.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5664 + ... + 5776.

2⁶⁴⁶³⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (861840).

646360 is an abundant number, since it is smaller than the sum of its proper divisors (1077320).

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

646360 is a wasteful number, since it uses less digits than its factorization.

646360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 646360 is about 803.9651733751. The cubic root of 646360 is about 86.4619097890.

The spelling of 646360 in words is "six hundred forty-six thousand, three hundred sixty".