1913339808 has 144 divisors (see below), whose sum is σ = 5566107456. Its totient is φ = 623293440.

The previous prime is 1913339773. The next prime is 1913339833. The reversal of 1913339808 is 8089333191.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2801035 + ... + 2801717.

It is an arithmetic number, because the mean of its divisors is an integer number (38653524).

Almost surely, 2^1913339808 is an apocalyptic number.

1913339808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1913339808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2783053728).

1913339808 is an abundant number, since it is smaller than the sum of its proper divisors (3652767648).

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

1913339808 is a wasteful number, since it uses less digits than its factorization.

1913339808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907 (or 896 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1913339808 is about 43741.7398830911. The cubic root of 1913339808 is about 1241.4542009710.

The spelling of 1913339808 in words is "one billion, nine hundred thirteen million, three hundred thirty-nine thousand, eight hundred eight".