1836881 has 4 divisors (see below), whose sum is σ = 1839600. Its totient is φ = 1834164.

The previous prime is 1836853. The next prime is 1836911. The reversal of 1836881 is 1886381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1836881 - 2¹⁸ = 1574737 is a prime.

It is a super-2 number, since 2×1836881² = 6748263616322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1836811) 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, 530 + ... + 1988.

It is an arithmetic number, because the mean of its divisors is an integer number (459900).

2^1836881 is an apocalyptic number.

It is an amenable number.

1836881 is a deficient number, since it is larger than the sum of its proper divisors (2719).

1836881 is a wasteful number, since it uses less digits than its factorization.

1836881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718.

The product of its digits is 9216, while the sum is 35.

The square root of 1836881 is about 1355.3158303510. The cubic root of 1836881 is about 122.4692356454.

The spelling of 1836881 in words is "one million, eight hundred thirty-six thousand, eight hundred eighty-one".