1388229 has 8 divisors (see below), whose sum is σ = 1886112. Its totient is φ = 907920.

The previous prime is 1388227. The next prime is 1388243. The reversal of 1388229 is 9228831.

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

It is not a de Polignac number, because 1388229 - 2¹ = 1388227 is a prime.

1388229 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388227) 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, 4207 + ... + 4524.

It is an arithmetic number, because the mean of its divisors is an integer number (235764).

2^1388229 is an apocalyptic number.

It is an amenable number.

1388229 is a deficient number, since it is larger than the sum of its proper divisors (497883).

1388229 is an equidigital number, since it uses as much as digits as its factorization.

1388229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8787.

The product of its digits is 6912, while the sum is 33.

The square root of 1388229 is about 1178.2313015703. The cubic root of 1388229 is about 111.5544854932.

It can be divided in two parts, 138822 and 9, that added together give a palindrome (138831).

The spelling of 1388229 in words is "one million, three hundred eighty-eight thousand, two hundred twenty-nine".