438632258689 has 4 divisors (see below), whose sum is σ = 438932899120. Its totient is φ = 438331618260.

The previous prime is 438632258627. The next prime is 438632258749. The reversal of 438632258689 is 986852236834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 438632258689 - 2¹⁵ = 438632225921 is a prime.

It is a super-2 number, since 2×438632258689² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 438632258689.

It is not an unprimeable number, because it can be changed into a prime (438632258789) 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 3 ways as a sum of consecutive naturals, for example, 150318027 + ... + 150320944.

It is an arithmetic number, because the mean of its divisors is an integer number (109733224780).

Almost surely, 2^438632258689 is an apocalyptic number.

It is an amenable number.

438632258689 is a deficient number, since it is larger than the sum of its proper divisors (300640431).

438632258689 is a wasteful number, since it uses less digits than its factorization.

438632258689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300640430.

The product of its digits is 119439360, while the sum is 64.

The spelling of 438632258689 in words is "four hundred thirty-eight billion, six hundred thirty-two million, two hundred fifty-eight thousand, six hundred eighty-nine".