1389394269 has 16 divisors (see below), whose sum is σ = 2059861440. Its totient is φ = 925588080.

The previous prime is 1389394231. The next prime is 1389394271. The reversal of 1389394269 is 9624939831.

It is a de Polignac number, because none of the positive numbers 2^k-1389394269 is a prime.

It is a super-2 number, since 2×1389394269² = 3860832869460088722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389394169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20499 + ... + 56559.

It is an arithmetic number, because the mean of its divisors is an integer number (128741340).

Almost surely, 2^1389394269 is an apocalyptic number.

It is an amenable number.

1389394269 is a deficient number, since it is larger than the sum of its proper divisors (670467171).

1389394269 is a wasteful number, since it uses less digits than its factorization.

1389394269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37497 (or 37491 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 1389394269 is about 37274.5793940052. The cubic root of 1389394269 is about 1115.8568942991.

The spelling of 1389394269 in words is "one billion, three hundred eighty-nine million, three hundred ninety-four thousand, two hundred sixty-nine".