1838342644 has 12 divisors (see below), whose sum is σ = 3386420800. Its totient is φ = 870793848.

The previous prime is 1838342629. The next prime is 1838342657. The reversal of 1838342644 is 4462438381.

It is a self number, because there is not a number n which added to its sum of digits gives 1838342644.

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 in 3 ways as a sum of consecutive naturals, for example, 12094284 + ... + 12094435.

Almost surely, 2^1838342644 is an apocalyptic number.

It is an amenable number.

1838342644 is a deficient number, since it is larger than the sum of its proper divisors (1548078156).

1838342644 is a wasteful number, since it uses less digits than its factorization.

1838342644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24188742 (or 24188740 counting only the distinct ones).

The product of its digits is 442368, while the sum is 43.

The square root of 1838342644 is about 42875.8981713503. The cubic root of 1838342644 is about 1225.0171079660.

The spelling of 1838342644 in words is "one billion, eight hundred thirty-eight million, three hundred forty-two thousand, six hundred forty-four".