1388394085 has 16 divisors (see below), whose sum is σ = 1795046400. Its totient is φ = 1024810560.

The previous prime is 1388394083. The next prime is 1388394101. The reversal of 1388394085 is 5804938831.

It is not a de Polignac number, because 1388394085 - 2¹ = 1388394083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388394083) 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, 217266 + ... + 223564.

It is an arithmetic number, because the mean of its divisors is an integer number (112190400).

Almost surely, 2^1388394085 is an apocalyptic number.

It is an amenable number.

1388394085 is a deficient number, since it is larger than the sum of its proper divisors (406652315).

1388394085 is a wasteful number, since it uses less digits than its factorization.

1388394085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9708.

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 1388394085 is about 37261.1605428494. The cubic root of 1388394085 is about 1115.5890725222.

The spelling of 1388394085 in words is "one billion, three hundred eighty-eight million, three hundred ninety-four thousand, eighty-five".