1809985076 has 12 divisors (see below), whose sum is σ = 3167932740. Its totient is φ = 904861440.

The previous prime is 1809985063. The next prime is 1809985109. The reversal of 1809985076 is 6705899081.

It can be written as a sum of positive squares in 2 ways, for example, as 333427600 + 1476557476 = 18260^2 + 38426^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2510 + ... + 60218.

It is an arithmetic number, because the mean of its divisors is an integer number (263994395).

Almost surely, 2^1809985076 is an apocalyptic number.

It is an amenable number.

1809985076 is a deficient number, since it is larger than the sum of its proper divisors (1357947664).

1809985076 is a wasteful number, since it uses less digits than its factorization.

1809985076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65554 (or 65552 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 53.

The square root of 1809985076 is about 42543.9193775092. The cubic root of 1809985076 is about 1218.6855582460.

The spelling of 1809985076 in words is "one billion, eight hundred nine million, nine hundred eighty-five thousand, seventy-six".