646343196 has 24 divisors (see below), whose sum is σ = 1596848400. Its totient is φ = 202774272.

The previous prime is 646343183. The next prime is 646343207. The reversal of 646343196 is 691343646.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1583971 + ... + 1584378.

It is an arithmetic number, because the mean of its divisors is an integer number (66535350).

Almost surely, 2^646343196 is an apocalyptic number.

It is an amenable number.

646343196 is an abundant number, since it is smaller than the sum of its proper divisors (950505204).

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

646343196 is a wasteful number, since it uses less digits than its factorization.

646343196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168373 (or 3168371 counting only the distinct ones).

The product of its digits is 279936, while the sum is 42.

The square root of 646343196 is about 25423.2805908286. The cubic root of 646343196 is about 864.6116050659.

The spelling of 646343196 in words is "six hundred forty-six million, three hundred forty-three thousand, one hundred ninety-six".