1438331 has 4 divisors (see below), whose sum is σ = 1442352. Its totient is φ = 1434312.

The previous prime is 1438303. The next prime is 1438379. The reversal of 1438331 is 1338341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1338341 = 19 ⋅70439.

It is a cyclic number.

It is not a de Polignac number, because 1438331 - 2⁶ = 1438267 is a prime.

It is a super-2 number, since 2×1438331² = 4137592131122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1438297 and 1438306.

It is not an unprimeable number, because it can be changed into a prime (1438231) 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, 1415 + ... + 2208.

It is an arithmetic number, because the mean of its divisors is an integer number (360588).

2^1438331 is an apocalyptic number.

1438331 is a deficient number, since it is larger than the sum of its proper divisors (4021).

1438331 is an equidigital number, since it uses as much as digits as its factorization.

1438331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020.

The product of its digits is 864, while the sum is 23.

The square root of 1438331 is about 1199.3043817147. The cubic root of 1438331 is about 112.8806791238.

The spelling of 1438331 in words is "one million, four hundred thirty-eight thousand, three hundred thirty-one".