1822438 has 4 divisors (see below), whose sum is σ = 2733660. Its totient is φ = 911218.

The previous prime is 1822427. The next prime is 1822439. The reversal of 1822438 is 8342281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8342281 = 659 ⋅12659.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455608 + ... + 455611.

It is an arithmetic number, because the mean of its divisors is an integer number (683415).

2^1822438 is an apocalyptic number.

1822438 is a deficient number, since it is larger than the sum of its proper divisors (911222).

1822438 is an equidigital number, since it uses as much as digits as its factorization.

1822438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911221.

The product of its digits is 3072, while the sum is 28.

The square root of 1822438 is about 1349.9770368417. The cubic root of 1822438 is about 122.1474075961.

The spelling of 1822438 in words is "one million, eight hundred twenty-two thousand, four hundred thirty-eight".