438197668 has 24 divisors (see below), whose sum is σ = 786560544. Its totient is φ = 213480000.

The previous prime is 438197663. The next prime is 438197671. The reversal of 438197668 is 866791834.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (438197663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193543 + ... + 195793.

It is an arithmetic number, because the mean of its divisors is an integer number (32773356).

Almost surely, 2^438197668 is an apocalyptic number.

It is an amenable number.

438197668 is a deficient number, since it is larger than the sum of its proper divisors (348362876).

438197668 is a wasteful number, since it uses less digits than its factorization.

438197668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483 (or 3481 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 52.

The square root of 438197668 is about 20933.1714749581. The cubic root of 438197668 is about 759.5505583656.

The spelling of 438197668 in words is "four hundred thirty-eight million, one hundred ninety-seven thousand, six hundred sixty-eight".