1388247565 has 8 divisors (see below), whose sum is σ = 1666106208. Its totient is φ = 1110458640.

The previous prime is 1388247551. The next prime is 1388247587. The reversal of 1388247565 is 5657428831.

It is a happy number.

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

It is not a de Polignac number, because 1388247565 - 2⁵ = 1388247533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50350 + ... + 72880.

It is an arithmetic number, because the mean of its divisors is an integer number (208263276).

Almost surely, 2^1388247565 is an apocalyptic number.

It is an amenable number.

1388247565 is a deficient number, since it is larger than the sum of its proper divisors (277858643).

1388247565 is a wasteful number, since it uses less digits than its factorization.

1388247565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34859.

The product of its digits is 1612800, while the sum is 49.

The square root of 1388247565 is about 37259.1943686387. The cubic root of 1388247565 is about 1115.5498276942.

The spelling of 1388247565 in words is "one billion, three hundred eighty-eight million, two hundred forty-seven thousand, five hundred sixty-five".