1438989 has 8 divisors (see below), whose sum is σ = 1980672. Its totient is φ = 928320.

The previous prime is 1438979. The next prime is 1438991. The reversal of 1438989 is 9898341.

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

It is not a de Polignac number, because 1438989 - 2⁴ = 1438973 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

1438989 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1438989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7644 + ... + 7829.

It is an arithmetic number, because the mean of its divisors is an integer number (247584).

2^1438989 is an apocalyptic number.

It is an amenable number.

1438989 is a deficient number, since it is larger than the sum of its proper divisors (541683).

1438989 is a wasteful number, since it uses less digits than its factorization.

1438989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15507.

The product of its digits is 62208, while the sum is 42.

The square root of 1438989 is about 1199.5786760359. The cubic root of 1438989 is about 112.8978898501.

The spelling of 1438989 in words is "one million, four hundred thirty-eight thousand, nine hundred eighty-nine".