438897439 has 4 divisors (see below), whose sum is σ = 441349560. Its totient is φ = 436445320.

The previous prime is 438897413. The next prime is 438897451. The reversal of 438897439 is 934798834.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438897439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 438897439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438897409) 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, 1225792 + ... + 1226149.

It is an arithmetic number, because the mean of its divisors is an integer number (110337390).

Almost surely, 2^438897439 is an apocalyptic number.

438897439 is a deficient number, since it is larger than the sum of its proper divisors (2452121).

438897439 is a wasteful number, since it uses less digits than its factorization.

438897439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452120.

The product of its digits is 5225472, while the sum is 55.

The square root of 438897439 is about 20949.8792120623. The cubic root of 438897439 is about 759.9546596912.

The spelling of 438897439 in words is "four hundred thirty-eight million, eight hundred ninety-seven thousand, four hundred thirty-nine".