1389920 has 96 divisors (see below), whose sum is σ = 4027968. Its totient is φ = 442368.

The previous prime is 1389919. The next prime is 1389943. The reversal of 1389920 is 299831.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19004 + ... + 19076.

It is an arithmetic number, because the mean of its divisors is an integer number (41958).

2^1389920 is an apocalyptic number.

1389920 is a gapful number since it is divisible by the number (10) 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 1389920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2013984).

1389920 is an abundant number, since it is smaller than the sum of its proper divisors (2638048).

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

1389920 is a wasteful number, since it uses less digits than its factorization.

1389920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1389920 is about 1178.9486842098. The cubic root of 1389920 is about 111.5997619073.

The spelling of 1389920 in words is "one million, three hundred eighty-nine thousand, nine hundred twenty".