1389024 has 144 divisors (see below), whose sum is σ = 4953312. Its totient is φ = 359424.

The previous prime is 1389007. The next prime is 1389083. The reversal of 1389024 is 4209831.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

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, 26182 + ... + 26234.

It is an arithmetic number, because the mean of its divisors is an integer number (34398).

2^1389024 is an apocalyptic number.

1389024 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 1389024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2476656).

1389024 is an abundant number, since it is smaller than the sum of its proper divisors (3564288).

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

1389024 is a wasteful number, since it uses less digits than its factorization.

1389024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1389024 is about 1178.5686233733. The cubic root of 1389024 is about 111.5757761429.

The spelling of 1389024 in words is "one million, three hundred eighty-nine thousand, twenty-four".