1840812638 has 16 divisors (see below), whose sum is σ = 3156865920. Its totient is φ = 788622936.

The previous prime is 1840812593. The next prime is 1840812703. The reversal of 1840812638 is 8362180481.

It is a junction number, because it is equal to n+sod(n) for n = 1840812595 and 1840812604.

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 7 ways as a sum of consecutive naturals, for example, 16145 + ... + 62787.

It is an arithmetic number, because the mean of its divisors is an integer number (197304120).

Almost surely, 2^1840812638 is an apocalyptic number.

1840812638 is a deficient number, since it is larger than the sum of its proper divisors (1316053282).

1840812638 is a wasteful number, since it uses less digits than its factorization.

1840812638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49471.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 1840812638 is about 42904.6924939452. The cubic root of 1840812638 is about 1225.5655060535.

The spelling of 1840812638 in words is "one billion, eight hundred forty million, eight hundred twelve thousand, six hundred thirty-eight".