1389140 has 12 divisors (see below), whose sum is σ = 2917236. Its totient is φ = 555648.

The previous prime is 1389139. The next prime is 1389149. The reversal of 1389140 is 419831.

It can be written as a sum of positive squares in 2 ways, for example, as 315844 + 1073296 = 562^2 + 1036^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34709 + ... + 34748.

It is an arithmetic number, because the mean of its divisors is an integer number (243103).

2^1389140 is an apocalyptic number.

1389140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389140 is an abundant number, since it is smaller than the sum of its proper divisors (1528096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1389140 is a wasteful number, since it uses less digits than its factorization.

1389140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69466 (or 69464 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1389140 is about 1178.6178345842. The cubic root of 1389140 is about 111.5788820239.

It can be divided in two parts, 13891 and 40, that added together give a palindrome (13931).

The spelling of 1389140 in words is "one million, three hundred eighty-nine thousand, one hundred forty".