1919669808 has 80 divisors (see below), whose sum is σ = 5710991616. Its totient is φ = 544277760.

The previous prime is 1919669803. The next prime is 1919669957. The reversal of 1919669808 is 8089669191.

1919669808 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1919669803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22210 + ... + 65822.

Almost surely, 2^1919669808 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 1919669808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2855495808).

1919669808 is an abundant number, since it is smaller than the sum of its proper divisors (3791321808).

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

1919669808 is a wasteful number, since it uses less digits than its factorization.

1919669808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43762 (or 43756 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 57.

The square root of 1919669808 is about 43814.0366549351. The cubic root of 1919669808 is about 1242.8217494555.

The spelling of 1919669808 in words is "one billion, nine hundred nineteen million, six hundred sixty-nine thousand, eight hundred eight".