438317998 has 4 divisors (see below), whose sum is σ = 657477000. Its totient is φ = 219158998.

The previous prime is 438317989. The next prime is 438318017. The reversal of 438317998 is 899713834.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 109579498 + ... + 109579501.

It is an arithmetic number, because the mean of its divisors is an integer number (164369250).

Almost surely, 2^438317998 is an apocalyptic number.

438317998 is a deficient number, since it is larger than the sum of its proper divisors (219159002).

438317998 is a wasteful number, since it uses less digits than its factorization.

438317998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219159001.

The product of its digits is 1306368, while the sum is 52.

The square root of 438317998 is about 20936.0454241005. The cubic root of 438317998 is about 759.6200767289.

The spelling of 438317998 in words is "four hundred thirty-eight million, three hundred seventeen thousand, nine hundred ninety-eight".