1838381775 has 48 divisors (see below), whose sum is σ = 3179930400. Its totient is φ = 935925760.

The previous prime is 1838381773. The next prime is 1838381813. The reversal of 1838381775 is 5771838381.

It is not a de Polignac number, because 1838381775 - 2¹ = 1838381773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838381773) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 188827 + ... + 198323.

It is an arithmetic number, because the mean of its divisors is an integer number (66248550).

Almost surely, 2^1838381775 is an apocalyptic number.

1838381775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1838381775 is a deficient number, since it is larger than the sum of its proper divisors (1341548625).

1838381775 is a wasteful number, since it uses less digits than its factorization.

1838381775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9628 (or 9623 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 51.

The square root of 1838381775 is about 42876.3544975549. The cubic root of 1838381775 is about 1225.0257998176.

The spelling of 1838381775 in words is "one billion, eight hundred thirty-eight million, three hundred eighty-one thousand, seven hundred seventy-five".