1438789 has 8 divisors (see below), whose sum is σ = 1582560. Its totient is φ = 1297200.

The previous prime is 1438771. The next prime is 1438793. The reversal of 1438789 is 9878341.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438789 is a prime.

It is a super-2 number, since 2×1438789² = 4140227573042, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438709) 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, 1059 + ... + 1999.

It is an arithmetic number, because the mean of its divisors is an integer number (197820).

2^1438789 is an apocalyptic number.

It is an amenable number.

1438789 is a deficient number, since it is larger than the sum of its proper divisors (143771).

1438789 is a wasteful number, since it uses less digits than its factorization.

1438789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091.

The product of its digits is 48384, while the sum is 40.

The square root of 1438789 is about 1199.4953105369. The cubic root of 1438789 is about 112.8926591814.

The spelling of 1438789 in words is "one million, four hundred thirty-eight thousand, seven hundred eighty-nine".