1388238055 has 8 divisors (see below), whose sum is σ = 1670427072. Its totient is φ = 1107562848.

The previous prime is 1388238043. The next prime is 1388238067. The reversal of 1388238055 is 5508328831.

It is an interprime number because it is at equal distance from previous prime (1388238043) and next prime (1388238067).

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

It is a cyclic number.

It is not a de Polignac number, because 1388238055 - 2⁷ = 1388237927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376432 + ... + 380101.

It is an arithmetic number, because the mean of its divisors is an integer number (208803384).

Almost surely, 2^1388238055 is an apocalyptic number.

1388238055 is a deficient number, since it is larger than the sum of its proper divisors (282189017).

1388238055 is an equidigital number, since it uses as much as digits as its factorization.

1388238055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756905.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 1388238055 is about 37259.0667489136. The cubic root of 1388238055 is about 1115.5472803812.

The spelling of 1388238055 in words is "one billion, three hundred eighty-eight million, two hundred thirty-eight thousand, fifty-five".