646363432 has 128 divisors (see below), whose sum is σ = 1516838400. Its totient is φ = 253843200.

The previous prime is 646363427. The next prime is 646363453. The reversal of 646363432 is 234363646.

It is a junction number, because it is equal to n+sod(n) for n = 646363391 and 646363400.

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 31 ways as a sum of consecutive naturals, for example, 2847303 + ... + 2847529.

It is an arithmetic number, because the mean of its divisors is an integer number (11850300).

Almost surely, 2^646363432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646363432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758419200).

646363432 is an abundant number, since it is smaller than the sum of its proper divisors (870474968).

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

646363432 is a wasteful number, since it uses less digits than its factorization.

646363432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 403 counting only the distinct ones).

The product of its digits is 186624, while the sum is 37.

The square root of 646363432 is about 25423.6785693967. The cubic root of 646363432 is about 864.6206281865.

The spelling of 646363432 in words is "six hundred forty-six million, three hundred sixty-three thousand, four hundred thirty-two".