1820786682 has 128 divisors (see below), whose sum is σ = 4579706880. Its totient is φ = 474336000.

The previous prime is 1820786599. The next prime is 1820786719. The reversal of 1820786682 is 2866870281.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 993507 + ... + 995337.

It is an arithmetic number, because the mean of its divisors is an integer number (35778960).

Almost surely, 2^1820786682 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1820786682, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2289853440).

1820786682 is an abundant number, since it is smaller than the sum of its proper divisors (2758920198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1820786682 is a wasteful number, since it uses less digits than its factorization.

1820786682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940.

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 1820786682 is about 42670.6770745438. The cubic root of 1820786682 is about 1221.1050370419.

The spelling of 1820786682 in words is "one billion, eight hundred twenty million, seven hundred eighty-six thousand, six hundred eighty-two".