1438669 has 4 divisors (see below), whose sum is σ = 1456960. Its totient is φ = 1420380.

The previous prime is 1438667. The next prime is 1438681. The reversal of 1438669 is 9668341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1438669 - 2¹ = 1438667 is a prime.

It is a super-2 number, since 2×1438669² = 4139536983122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9027 + ... + 9184.

It is an arithmetic number, because the mean of its divisors is an integer number (364240).

2^1438669 is an apocalyptic number.

1438669 is the 693-rd hex number.

It is an amenable number.

1438669 is a deficient number, since it is larger than the sum of its proper divisors (18291).

1438669 is an equidigital number, since it uses as much as digits as its factorization.

1438669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18290.

The product of its digits is 31104, while the sum is 37.

The square root of 1438669 is about 1199.4452884563. The cubic root of 1438669 is about 112.8895205475.

It can be divided in two parts, 14 and 38669, that added together give a palindrome (38683).

The spelling of 1438669 in words is "one million, four hundred thirty-eight thousand, six hundred sixty-nine".