646350 has 48 divisors (see below), whose sum is σ = 1666560. Its totient is φ = 165600.

The previous prime is 646339. The next prime is 646379. The reversal of 646350 is 53646.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 646350.

It is a congruent number.

It is an unprimeable number.

646350 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 23 ways as a sum of consecutive naturals, for example, 4581 + ... + 4719.

It is an arithmetic number, because the mean of its divisors is an integer number (34720).

2⁶⁴⁶³⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (833280).

646350 is an abundant number, since it is smaller than the sum of its proper divisors (1020210).

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

646350 is a wasteful number, since it uses less digits than its factorization.

646350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 646350 is about 803.9589541761. The cubic root of 646350 is about 86.4614638953.

Adding to 646350 its reverse (53646), we get a palindrome (699996).

Subtracting from 646350 its reverse (53646), we obtain a cube (592704 = 84³).

The spelling of 646350 in words is "six hundred forty-six thousand, three hundred fifty".