438565982 has 4 divisors (see below), whose sum is σ = 657848976. Its totient is φ = 219282990.

The previous prime is 438565979. The next prime is 438565993. The reversal of 438565982 is 289565834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 289565834 = 2 ⋅144782917.

It is a self number, because there is not a number n which added to its sum of digits gives 438565982.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 109641494 + ... + 109641497.

It is an arithmetic number, because the mean of its divisors is an integer number (164462244).

Almost surely, 2^438565982 is an apocalyptic number.

438565982 is a deficient number, since it is larger than the sum of its proper divisors (219282994).

438565982 is a wasteful number, since it uses less digits than its factorization.

438565982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219282993.

The product of its digits is 2073600, while the sum is 50.

The square root of 438565982 is about 20941.9670040806. The cubic root of 438565982 is about 759.7633046381.

The spelling of 438565982 in words is "four hundred thirty-eight million, five hundred sixty-five thousand, nine hundred eighty-two".