1358438439 has 4 divisors (see below), whose sum is σ = 1811251256. Its totient is φ = 905625624.

The previous prime is 1358438423. The next prime is 1358438453. The reversal of 1358438439 is 9348348531.

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

It is not a de Polignac number, because 1358438439 - 2⁴ = 1358438423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1358438539) 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, 226406404 + ... + 226406409.

It is an arithmetic number, because the mean of its divisors is an integer number (452812814).

Almost surely, 2^1358438439 is an apocalyptic number.

1358438439 is a deficient number, since it is larger than the sum of its proper divisors (452812817).

1358438439 is an equidigital number, since it uses as much as digits as its factorization.

1358438439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452812816.

The product of its digits is 1244160, while the sum is 48.

The square root of 1358438439 is about 36856.9998643406. Note that the first 3 decimals coincide. The cubic root of 1358438439 is about 1107.5074441323.

The spelling of 1358438439 in words is "one billion, three hundred fifty-eight million, four hundred thirty-eight thousand, four hundred thirty-nine".