1844138636 has 12 divisors (see below), whose sum is σ = 3228178800. Its totient is φ = 921801840.

The previous prime is 1844138609. The next prime is 1844138663. The reversal of 1844138636 is 6368314481.

It is an interprime number because it is at equal distance from previous prime (1844138609) and next prime (1844138663).

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, 50936 + ... + 79263.

It is an arithmetic number, because the mean of its divisors is an integer number (269014900).

Almost surely, 2^1844138636 is an apocalyptic number.

It is an amenable number.

1844138636 is a deficient number, since it is larger than the sum of its proper divisors (1384040164).

1844138636 is a wasteful number, since it uses less digits than its factorization.

1844138636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133744 (or 133742 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The square root of 1844138636 is about 42943.4353073901. The cubic root of 1844138636 is about 1226.3031831370.

The spelling of 1844138636 in words is "one billion, eight hundred forty-four million, one hundred thirty-eight thousand, six hundred thirty-six".