646333212 has 48 divisors (see below), whose sum is σ = 1798497792. Its totient is φ = 176637120.

The previous prime is 646333199. The next prime is 646333231. The reversal of 646333212 is 212333646.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 646333212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165339 + ... + 169202.

It is an arithmetic number, because the mean of its divisors is an integer number (37468704).

Almost surely, 2^646333212 is an apocalyptic number.

It is an amenable number.

646333212 is an abundant number, since it is smaller than the sum of its proper divisors (1152164580).

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

646333212 is a wasteful number, since it uses less digits than its factorization.

646333212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334578 (or 334576 counting only the distinct ones).

The product of its digits is 15552, while the sum is 30.

The square root of 646333212 is about 25423.0842346085. The cubic root of 646333212 is about 864.6071531860.

Adding to 646333212 its reverse (212333646), we get a palindrome (858666858).

The spelling of 646333212 in words is "six hundred forty-six million, three hundred thirty-three thousand, two hundred twelve".