1920868368 has 80 divisors (see below), whose sum is σ = 5304410496. Its totient is φ = 597498880.

The previous prime is 1920868343. The next prime is 1920868373. The reversal of 1920868368 is 8638680291.

It is a self number, because there is not a number n which added to its sum of digits gives 1920868368.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24046 + ... + 66482.

Almost surely, 2^1920868368 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 1920868368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2652205248).

1920868368 is an abundant number, since it is smaller than the sum of its proper divisors (3383542128).

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

1920868368 is a wasteful number, since it uses less digits than its factorization.

1920868368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42512 (or 42506 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The square root of 1920868368 is about 43827.7123290733. The cubic root of 1920868368 is about 1243.0803506176.

The spelling of 1920868368 in words is "one billion, nine hundred twenty million, eight hundred sixty-eight thousand, three hundred sixty-eight".