1838243904 has 112 divisors (see below), whose sum is σ = 5800270848. Its totient is φ = 502368768.

The previous prime is 1838243903. The next prime is 1838243929. The reversal of 1838243904 is 4093428381.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×1838243904² = 6758281301186322432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1838243903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1179 + ... + 60645.

Almost surely, 2^1838243904 is an apocalyptic number.

1838243904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1838243904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2900135424).

1838243904 is an abundant number, since it is smaller than the sum of its proper divisors (3962026944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1838243904 is a wasteful number, since it uses less digits than its factorization.

1838243904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59512 (or 59502 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 1838243904 is about 42874.7466931293. The cubic root of 1838243904 is about 1224.9951751025.

The spelling of 1838243904 in words is "one billion, eight hundred thirty-eight million, two hundred forty-three thousand, nine hundred four".