1389456 has 30 divisors (see below), whose sum is σ = 3888950. Its totient is φ = 463104.

The previous prime is 1389439. The next prime is 1389469. The reversal of 1389456 is 6549831.

It can be written as a sum of positive squares in only one way, i.e., 921600 + 467856 = 960^2 + 684^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1389456.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4681 + ... + 4968.

2^1389456 is an apocalyptic number.

1389456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1389456 is an abundant number, since it is smaller than the sum of its proper divisors (2499494).

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

1389456 is a wasteful number, since it uses less digits than its factorization.

1389456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9663 (or 9654 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1389456 is about 1178.7518822891. The cubic root of 1389456 is about 111.5873419952.

The spelling of 1389456 in words is "one million, three hundred eighty-nine thousand, four hundred fifty-six".