1388090 has 16 divisors (see below), whose sum is σ = 2725920. Its totient is φ = 504720.

The previous prime is 1388081. The next prime is 1388113. The reversal of 1388090 is 908831.

It is a happy number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 6200 + ... + 6419.

It is an arithmetic number, because the mean of its divisors is an integer number (170370).

2^1388090 is an apocalyptic number.

1388090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388090 is a deficient number, since it is larger than the sum of its proper divisors (1337830).

1388090 is a wasteful number, since it uses less digits than its factorization.

1388090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12637.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1388090 is about 1178.1723133736. The cubic root of 1388090 is about 111.5507621423.

It can be divided in two parts, 138 and 8090, that added together give a palindrome (8228).

The spelling of 1388090 in words is "one million, three hundred eighty-eight thousand, ninety".