1838428511 has 4 divisors (see below), whose sum is σ = 1838602224. Its totient is φ = 1838254800.

The previous prime is 1838428481. The next prime is 1838428517. The reversal of 1838428511 is 1158248381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1838428511 - 2⁶ = 1838428447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838428517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69875 + ... + 92516.

It is an arithmetic number, because the mean of its divisors is an integer number (459650556).

Almost surely, 2^1838428511 is an apocalyptic number.

1838428511 is a deficient number, since it is larger than the sum of its proper divisors (173713).

1838428511 is a wasteful number, since it uses less digits than its factorization.

1838428511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173712.

The product of its digits is 61440, while the sum is 41.

The square root of 1838428511 is about 42876.8995031124. The cubic root of 1838428511 is about 1225.0361807445.

The spelling of 1838428511 in words is "one billion, eight hundred thirty-eight million, four hundred twenty-eight thousand, five hundred eleven".