438669289 has 4 divisors (see below), whose sum is σ = 438721024. Its totient is φ = 438617556.

The previous prime is 438669263. The next prime is 438669347. The reversal of 438669289 is 982966834.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 982966834 = 2 ⋅491483417.

It is a cyclic number.

It is not a de Polignac number, because 438669289 - 2²¹ = 436572137 is a prime.

It is a super-2 number, since 2×438669289² = 384861490223531042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438669229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9837 + ... + 31210.

It is an arithmetic number, because the mean of its divisors is an integer number (109680256).

Almost surely, 2^438669289 is an apocalyptic number.

It is an amenable number.

438669289 is a deficient number, since it is larger than the sum of its proper divisors (51735).

438669289 is a wasteful number, since it uses less digits than its factorization.

438669289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51734.

The product of its digits is 4478976, while the sum is 55.

The square root of 438669289 is about 20944.4333654554. The cubic root of 438669289 is about 759.8229556438.

The spelling of 438669289 in words is "four hundred thirty-eight million, six hundred sixty-nine thousand, two hundred eighty-nine".