1822638 has 32 divisors (see below), whose sum is σ = 3919104. Its totient is φ = 563072.

The previous prime is 1822637. The next prime is 1822649. The reversal of 1822638 is 8362281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10831 + ... + 10997.

It is an arithmetic number, because the mean of its divisors is an integer number (122472).

2^1822638 is an apocalyptic number.

1822638 is an abundant number, since it is smaller than the sum of its proper divisors (2096466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1822638 is a wasteful number, since it uses less digits than its factorization.

1822638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296.

The product of its digits is 4608, while the sum is 30.

The square root of 1822638 is about 1350.0511101436. The cubic root of 1822638 is about 122.1518757112.

The spelling of 1822638 in words is "one million, eight hundred twenty-two thousand, six hundred thirty-eight".