1393888639 has 8 divisors (see below), whose sum is σ = 1637575632. Its totient is φ = 1169696640.

The previous prime is 1393888609. The next prime is 1393888649. The reversal of 1393888639 is 9368883931.

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

It is a cyclic number.

It is not a de Polignac number, because 1393888639 - 2²⁹ = 857017727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393888609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4873594 + ... + 4873879.

It is an arithmetic number, because the mean of its divisors is an integer number (204696954).

Almost surely, 2^1393888639 is an apocalyptic number.

1393888639 is a deficient number, since it is larger than the sum of its proper divisors (243686993).

1393888639 is a wasteful number, since it uses less digits than its factorization.

1393888639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9747497.

The product of its digits is 6718464, while the sum is 58.

The square root of 1393888639 is about 37334.8180523222. The cubic root of 1393888639 is about 1117.0587791835.

The spelling of 1393888639 in words is "one billion, three hundred ninety-three million, eight hundred eighty-eight thousand, six hundred thirty-nine".