1388343715 has 12 divisors (see below), whose sum is σ = 1831237632. Its totient is φ = 1009704080.

The previous prime is 1388343643. The next prime is 1388343721. The reversal of 1388343715 is 5173438831.

It is not a de Polignac number, because 1388343715 - 2¹⁵ = 1388310947 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1146787 + ... + 1147996.

It is an arithmetic number, because the mean of its divisors is an integer number (152603136).

Almost surely, 2^1388343715 is an apocalyptic number.

1388343715 is a deficient number, since it is larger than the sum of its proper divisors (442893917).

1388343715 is a wasteful number, since it uses less digits than its factorization.

1388343715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294810 (or 2294799 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 1388343715 is about 37260.4846318456. The cubic root of 1388343715 is about 1115.5755814196.

The spelling of 1388343715 in words is "one billion, three hundred eighty-eight million, three hundred forty-three thousand, seven hundred fifteen".