1838281 has 4 divisors (see below), whose sum is σ = 1901700. Its totient is φ = 1774864.

The previous prime is 1838257. The next prime is 1838297. The reversal of 1838281 is 1828381.

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 1229881 + 608400 = 1109^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1838281 - 2¹³ = 1830089 is a prime.

It is a super-2 number, since 2×1838281² = 6758554069922, which contains 22 as substring.

It is a Duffinian number.

1838281 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808281) 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, 31666 + ... + 31723.

It is an arithmetic number, because the mean of its divisors is an integer number (475425).

2^1838281 is an apocalyptic number.

It is an amenable number.

1838281 is a deficient number, since it is larger than the sum of its proper divisors (63419).

1838281 is an equidigital number, since it uses as much as digits as its factorization.

1838281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63418.

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

The square root of 1838281 is about 1355.8322167584. The cubic root of 1838281 is about 122.5003415234.

It can be divided in two parts, 183 and 8281, that added together give a square (8464 = 92²).

The spelling of 1838281 in words is "one million, eight hundred thirty-eight thousand, two hundred eighty-one".