438445686 has 16 divisors (see below), whose sum is σ = 1002161664. Its totient is φ = 125270184.

The previous prime is 438445649. The next prime is 438445687. The reversal of 438445686 is 686544834.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438445687) 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 7 ways as a sum of consecutive naturals, for example, 5219550 + ... + 5219633.

It is an arithmetic number, because the mean of its divisors is an integer number (62635104).

Almost surely, 2^438445686 is an apocalyptic number.

438445686 is an abundant number, since it is smaller than the sum of its proper divisors (563715978).

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

438445686 is a wasteful number, since it uses less digits than its factorization.

438445686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10439195.

The product of its digits is 2211840, while the sum is 48.

The square root of 438445686 is about 20939.0946795701. The cubic root of 438445686 is about 759.6938321239.

The spelling of 438445686 in words is "four hundred thirty-eight million, four hundred forty-five thousand, six hundred eighty-six".