1390289 has 8 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 1330000.

The previous prime is 1390283. The next prime is 1390297. The reversal of 1390289 is 9820931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1390289 - 2¹² = 1386193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5414 + ... + 5664.

It is an arithmetic number, because the mean of its divisors is an integer number (181440).

2^1390289 is an apocalyptic number.

It is an amenable number.

1390289 is a deficient number, since it is larger than the sum of its proper divisors (61231).

1390289 is a wasteful number, since it uses less digits than its factorization.

1390289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471.

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

The square root of 1390289 is about 1179.1051691855. The cubic root of 1390289 is about 111.6096369765.

The spelling of 1390289 in words is "one million, three hundred ninety thousand, two hundred eighty-nine".