646367412 has 12 divisors (see below), whose sum is σ = 1508190656. Its totient is φ = 215455800.

The previous prime is 646367411. The next prime is 646367437. The reversal of 646367412 is 214763646.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646367411) 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 3 ways as a sum of consecutive naturals, for example, 26931964 + ... + 26931987.

Almost surely, 2^646367412 is an apocalyptic number.

It is an amenable number.

646367412 is an abundant number, since it is smaller than the sum of its proper divisors (861823244).

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

646367412 is a wasteful number, since it uses less digits than its factorization.

646367412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53863958 (or 53863956 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 646367412 is about 25423.7568427642. The cubic root of 646367412 is about 864.6224028243.

The spelling of 646367412 in words is "six hundred forty-six million, three hundred sixty-seven thousand, four hundred twelve".