1919912808 has 96 divisors (see below), whose sum is σ = 5310658080. Its totient is φ = 577948800.

The previous prime is 1919912803. The next prime is 1919912809. The reversal of 1919912808 is 8082199191.

It is not an unprimeable number, because it can be changed into a prime (1919912803) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 453823 + ... + 458033.

It is an arithmetic number, because the mean of its divisors is an integer number (55319355).

Almost surely, 2^1919912808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1919912808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2655329040).

1919912808 is an abundant number, since it is smaller than the sum of its proper divisors (3390745272).

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

1919912808 is a wasteful number, since it uses less digits than its factorization.

1919912808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399 (or 4384 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 48.

The square root of 1919912808 is about 43816.8096510917. The cubic root of 1919912808 is about 1242.8741878039.

The spelling of 1919912808 in words is "one billion, nine hundred nineteen million, nine hundred twelve thousand, eight hundred eight".