1806738172 has 12 divisors (see below), whose sum is σ = 3347779680. Its totient is φ = 850229696.

The previous prime is 1806738169. The next prime is 1806738203. The reversal of 1806738172 is 2718376081.

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, 13284772 + ... + 13284907.

It is an arithmetic number, because the mean of its divisors is an integer number (278981640).

Almost surely, 2^1806738172 is an apocalyptic number.

It is an amenable number.

1806738172 is a deficient number, since it is larger than the sum of its proper divisors (1541041508).

1806738172 is a wasteful number, since it uses less digits than its factorization.

1806738172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26569700 (or 26569698 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 1806738172 is about 42505.7428120013. The cubic root of 1806738172 is about 1217.9563950549.

The spelling of 1806738172 in words is "one billion, eight hundred six million, seven hundred thirty-eight thousand, one hundred seventy-two".