1388985 has 32 divisors (see below), whose sum is σ = 2540160. Its totient is φ = 642048.

The previous prime is 1388969. The next prime is 1389001. The reversal of 1388985 is 5898831.

It is an interprime number because it is at equal distance from previous prime (1388969) and next prime (1389001).

It is not a de Polignac number, because 1388985 - 2⁴ = 1388969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3106 + ... + 3524.

It is an arithmetic number, because the mean of its divisors is an integer number (79380).

2^1388985 is an apocalyptic number.

1388985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388985 is a deficient number, since it is larger than the sum of its proper divisors (1151175).

1388985 is a wasteful number, since it uses less digits than its factorization.

1388985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457.

The product of its digits is 69120, while the sum is 42.

The square root of 1388985 is about 1178.5520777632. The cubic root of 1388985 is about 111.5747318855.

The spelling of 1388985 in words is "one million, three hundred eighty-eight thousand, nine hundred eighty-five".