1838228381 has 16 divisors (see below), whose sum is σ = 2032466688. Its totient is φ = 1648632000.

The previous prime is 1838228363. The next prime is 1838228387.

1838228381 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1838228381 - 2¹⁴ = 1838211997 is a prime.

It is a super-2 number, since 2×1838228381² = 6758167161427762322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838228387) 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, 322700 + ... + 328346.

It is an arithmetic number, because the mean of its divisors is an integer number (127029168).

Almost surely, 2^1838228381 is an apocalyptic number.

1838228381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1838228381 is a deficient number, since it is larger than the sum of its proper divisors (194238307).

1838228381 is a wasteful number, since it uses less digits than its factorization.

1838228381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052.

The product of its digits is 147456, while the sum is 44.

The square root of 1838228381 is about 42874.5656654385. The cubic root of 1838228381 is about 1224.9917269468.

The spelling of 1838228381 in words is "one billion, eight hundred thirty-eight million, two hundred twenty-eight thousand, three hundred eighty-one".