1389632 has 14 divisors (see below), whose sum is σ = 2757678. Its totient is φ = 694784.

The previous prime is 1389629. The next prime is 1389643. The reversal of 1389632 is 2369831.

It can be written as a sum of positive squares in only one way, i.e., 1048576 + 341056 = 1024^2 + 584^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10793 + ... + 10920.

It is an arithmetic number, because the mean of its divisors is an integer number (196977).

2^1389632 is an apocalyptic number.

It is an amenable number.

1389632 is a deficient number, since it is larger than the sum of its proper divisors (1368046).

1389632 is an equidigital number, since it uses as much as digits as its factorization.

1389632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21725 (or 21715 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 1389632 is about 1178.8265351611. The cubic root of 1389632 is about 111.5920533218.

The spelling of 1389632 in words is "one million, three hundred eighty-nine thousand, six hundred thirty-two".