1838209742 has 4 divisors (see below), whose sum is σ = 2757314616. Its totient is φ = 919104870.

The previous prime is 1838209727. The next prime is 1838209757. The reversal of 1838209742 is 2479028381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2479028381 = 1433 ⋅1729957.

It is an interprime number because it is at equal distance from previous prime (1838209727) and next prime (1838209757).

It is a junction number, because it is equal to n+sod(n) for n = 1838209693 and 1838209702.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 459552434 + ... + 459552437.

It is an arithmetic number, because the mean of its divisors is an integer number (689328654).

Almost surely, 2^1838209742 is an apocalyptic number.

1838209742 is a deficient number, since it is larger than the sum of its proper divisors (919104874).

1838209742 is an equidigital number, since it uses as much as digits as its factorization.

1838209742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919104873.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 1838209742 is about 42874.3482982541. The cubic root of 1838209742 is about 1224.9875866020.

The spelling of 1838209742 in words is "one billion, eight hundred thirty-eight million, two hundred nine thousand, seven hundred forty-two".