1438869399 has 8 divisors (see below), whose sum is σ = 2092900992. Its totient is φ = 872042040.

The previous prime is 1438869389. The next prime is 1438869413. The reversal of 1438869399 is 9939688341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1438869399 - 2⁹ = 1438868887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438869329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21801019 + ... + 21801084.

It is an arithmetic number, because the mean of its divisors is an integer number (261612624).

Almost surely, 2^1438869399 is an apocalyptic number.

1438869399 is a deficient number, since it is larger than the sum of its proper divisors (654031593).

1438869399 is a wasteful number, since it uses less digits than its factorization.

1438869399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43602117.

The product of its digits is 10077696, while the sum is 60.

The square root of 1438869399 is about 37932.4320206337. The cubic root of 1438869399 is about 1128.9476194231.

The spelling of 1438869399 in words is "one billion, four hundred thirty-eight million, eight hundred sixty-nine thousand, three hundred ninety-nine".