1798672636 has 24 divisors (see below), whose sum is σ = 3169138896. Its totient is φ = 893224320.

The previous prime is 1798672621. The next prime is 1798672637. The reversal of 1798672636 is 6362768971.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798672637) by changing a digit.

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, 416440 + ... + 420736.

It is an arithmetic number, because the mean of its divisors is an integer number (132047454).

Almost surely, 2^1798672636 is an apocalyptic number.

It is an amenable number.

1798672636 is a deficient number, since it is larger than the sum of its proper divisors (1370466260).

1798672636 is a wasteful number, since it uses less digits than its factorization.

1798672636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4989 (or 4987 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 55.

The square root of 1798672636 is about 42410.7608514632. The cubic root of 1798672636 is about 1216.1413146234.

The spelling of 1798672636 in words is "one billion, seven hundred ninety-eight million, six hundred seventy-two thousand, six hundred thirty-six".