1438438 has 8 divisors (see below), whose sum is σ = 2284632. Its totient is φ = 676896.

The previous prime is 1438417. The next prime is 1438447. The reversal of 1438438 is 8348341.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21120 + ... + 21187.

It is an arithmetic number, because the mean of its divisors is an integer number (285579).

2^1438438 is an apocalyptic number.

1438438 is a deficient number, since it is larger than the sum of its proper divisors (846194).

1438438 is a wasteful number, since it uses less digits than its factorization.

1438438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42326.

The product of its digits is 9216, while the sum is 31.

The square root of 1438438 is about 1199.3489900775. The cubic root of 1438438 is about 112.8834781859.

Subtracting 1438438 from its reverse (8348341), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1438438 in words is "one million, four hundred thirty-eight thousand, four hundred thirty-eight".