1388582085 has 24 divisors (see below), whose sum is σ = 2442071520. Its totient is φ = 673251040.

The previous prime is 1388582077. The next prime is 1388582093. The reversal of 1388582085 is 5802858831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1388582077) and next prime (1388582093).

It is not a de Polignac number, because 1388582085 - 2³ = 1388582077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 380715 + ... + 384344.

It is an arithmetic number, because the mean of its divisors is an integer number (101752980).

Almost surely, 2^1388582085 is an apocalyptic number.

1388582085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388582085 is a deficient number, since it is larger than the sum of its proper divisors (1053489435).

1388582085 is a wasteful number, since it uses less digits than its factorization.

1388582085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765089 (or 765078 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 48.

The square root of 1388582085 is about 37263.6831915472. The cubic root of 1388582085 is about 1115.6394235673.

The spelling of 1388582085 in words is "one billion, three hundred eighty-eight million, five hundred eighty-two thousand, eighty-five".