643224414 has 32 divisors (see below), whose sum is σ = 1472242176. Its totient is φ = 183526560.

The previous prime is 643224349. The next prime is 643224419. The reversal of 643224414 is 414422346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643224419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21679 + ... + 41909.

It is an arithmetic number, because the mean of its divisors is an integer number (46007568).

Almost surely, 2^643224414 is an apocalyptic number.

643224414 is an abundant number, since it is smaller than the sum of its proper divisors (829017762).

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

643224414 is a wasteful number, since it uses less digits than its factorization.

643224414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21000.

The product of its digits is 18432, while the sum is 30.

The square root of 643224414 is about 25361.8692923057. The cubic root of 643224414 is about 863.2187000973.

The spelling of 643224414 in words is "six hundred forty-three million, two hundred twenty-four thousand, four hundred fourteen".