1838888381 has 8 divisors (see below), whose sum is σ = 2111642400. Its totient is φ = 1583731440.

The previous prime is 1838888377. The next prime is 1838888393.

It is a happy number.

1838888381 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1838888381 - 2² = 1838888377 is a prime.

It is a super-2 number, since 2×1838888381² = 6763020955553602322, 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 (1838888321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4399046 + ... + 4399463.

It is an arithmetic number, because the mean of its divisors is an integer number (263955300).

Almost surely, 2^1838888381 is an apocalyptic number.

1838888381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1838888381 is a deficient number, since it is larger than the sum of its proper divisors (272754019).

1838888381 is a wasteful number, since it uses less digits than its factorization.

1838888381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8798539.

The product of its digits is 2359296, while the sum is 56.

The square root of 1838888381 is about 42882.2618456629. The cubic root of 1838888381 is about 1225.1383169654.

The spelling of 1838888381 in words is "one billion, eight hundred thirty-eight million, eight hundred eighty-eight thousand, three hundred eighty-one".