1920785841 has 12 divisors (see below), whose sum is σ = 2987889268. Its totient is φ = 1182021984.

The previous prime is 1920785837. The next prime is 1920785857. The reversal of 1920785841 is 1485870291.

It can be written as a sum of positive squares in 2 ways, for example, as 186896241 + 1733889600 = 13671^2 + 41640^2 .

It is not a de Polignac number, because 1920785841 - 2² = 1920785837 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1920785831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8208370 + ... + 8208603.

Almost surely, 2^1920785841 is an apocalyptic number.

It is an amenable number.

1920785841 is a deficient number, since it is larger than the sum of its proper divisors (1067103427).

1920785841 is a wasteful number, since it uses less digits than its factorization.

1920785841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16416992 (or 16416989 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1920785841 is about 43826.7708256038. The cubic root of 1920785841 is about 1243.0625480510.

The spelling of 1920785841 in words is "one billion, nine hundred twenty million, seven hundred eighty-five thousand, eight hundred forty-one".