1388355 has 8 divisors (see below), whose sum is σ = 2221392. Its totient is φ = 740448.

The previous prime is 1388353. The next prime is 1388357. The reversal of 1388355 is 5538831.

It is an interprime number because it is at equal distance from previous prime (1388353) and next prime (1388357).

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

It is not a de Polignac number, because 1388355 - 2¹ = 1388353 is a prime.

1388355 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1388353) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 46264 + ... + 46293.

It is an arithmetic number, because the mean of its divisors is an integer number (277674).

2^1388355 is an apocalyptic number.

1388355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1388355 is a deficient number, since it is larger than the sum of its proper divisors (833037).

1388355 is an equidigital number, since it uses as much as digits as its factorization.

1388355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92565.

The product of its digits is 14400, while the sum is 33.

The square root of 1388355 is about 1178.2847703336. The cubic root of 1388355 is about 111.5578604023.

The spelling of 1388355 in words is "one million, three hundred eighty-eight thousand, three hundred fifty-five".