1920519988 has 12 divisors (see below), whose sum is σ = 3558610692. Its totient is φ = 903774080.

The previous prime is 1920519977. The next prime is 1920520009. The reversal of 1920519988 is 8899150291.

It can be written as a sum of positive squares in 2 ways, for example, as 1673464464 + 247055524 = 40908^2 + 15718^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14121403 + ... + 14121538.

It is an arithmetic number, because the mean of its divisors is an integer number (296550891).

Almost surely, 2^1920519988 is an apocalyptic number.

It is an amenable number.

1920519988 is a deficient number, since it is larger than the sum of its proper divisors (1638090704).

1920519988 is a wasteful number, since it uses less digits than its factorization.

1920519988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28242962 (or 28242960 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 52.

The square root of 1920519988 is about 43823.7377228369. The cubic root of 1920519988 is about 1243.0051952828.

It can be divided in two parts, 19205 and 19988, that added together give a palindrome (39193).

The spelling of 1920519988 in words is "one billion, nine hundred twenty million, five hundred nineteen thousand, nine hundred eighty-eight".