646493382 has 24 divisors (see below), whose sum is σ = 1403779104. Its totient is φ = 215029584.

The previous prime is 646493359. The next prime is 646493383. The reversal of 646493382 is 283394646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646493383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30453 + ... + 47120.

It is an arithmetic number, because the mean of its divisors is an integer number (58490796).

Almost surely, 2^646493382 is an apocalyptic number.

646493382 is an abundant number, since it is smaller than the sum of its proper divisors (757285722).

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

646493382 is a wasteful number, since it uses less digits than its factorization.

646493382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78044 (or 78041 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 646493382 is about 25426.2341293397. The cubic root of 646493382 is about 864.6785676862.

The spelling of 646493382 in words is "six hundred forty-six million, four hundred ninety-three thousand, three hundred eighty-two".