1823881 has 4 divisors (see below), whose sum is σ = 1837332. Its totient is φ = 1810432.

The previous prime is 1823863. The next prime is 1823903. The reversal of 1823881 is 1883281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 855625 + 968256 = 925^2 + 984^2 .

It is a cyclic number.

It is not a de Polignac number, because 1823881 - 2⁵ = 1823849 is a prime.

It is a super-2 number, since 2×1823881² = 6653083804322, which contains 22 as substring.

It is a Duffinian number.

1823881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1823281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6520 + ... + 6793.

It is an arithmetic number, because the mean of its divisors is an integer number (459333).

2^1823881 is an apocalyptic number.

It is an amenable number.

1823881 is a deficient number, since it is larger than the sum of its proper divisors (13451).

1823881 is a wasteful number, since it uses less digits than its factorization.

1823881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13450.

The product of its digits is 3072, while the sum is 31.

The square root of 1823881 is about 1350.5113846244. The cubic root of 1823881 is about 122.1796377204.

It can be divided in two parts, 1823 and 881, that added together give a square (2704 = 52²).

The spelling of 1823881 in words is "one million, eight hundred twenty-three thousand, eight hundred eighty-one".