1809685982 has 16 divisors (see below), whose sum is σ = 2925388032. Its totient is φ = 834654240.

The previous prime is 1809685957. The next prime is 1809686009. The reversal of 1809685982 is 2895869081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14588 + ... + 61904.

It is an arithmetic number, because the mean of its divisors is an integer number (182836752).

Almost surely, 2^1809685982 is an apocalyptic number.

1809685982 is a deficient number, since it is larger than the sum of its proper divisors (1115702050).

1809685982 is a wasteful number, since it uses less digits than its factorization.

1809685982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48803.

The product of its (nonzero) digits is 2488320, while the sum is 56.

The square root of 1809685982 is about 42540.4041118558. The cubic root of 1809685982 is about 1218.6184266395.

The spelling of 1809685982 in words is "one billion, eight hundred nine million, six hundred eighty-five thousand, nine hundred eighty-two".