1389444 has 72 divisors (see below), whose sum is σ = 4021920. Its totient is φ = 370944.

The previous prime is 1389439. The next prime is 1389469. The reversal of 1389444 is 4449831.

1389444 = T₁₁₇ + T₁₁₈ + ... + T₂₁₄.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9927 + ... + 10065.

It is an arithmetic number, because the mean of its divisors is an integer number (55860).

2^1389444 is an apocalyptic number.

1389444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2010960).

1389444 is an abundant number, since it is smaller than the sum of its proper divisors (2632476).

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

1389444 is a wasteful number, since it uses less digits than its factorization.

1389444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 168 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 1389444 is about 1178.7467921483. The cubic root of 1389444 is about 111.5870207539.

The spelling of 1389444 in words is "one million, three hundred eighty-nine thousand, four hundred forty-four".