1920065808 has 40 divisors (see below), whose sum is σ = 5065711488. Its totient is φ = 626403712.

The previous prime is 1920065803. The next prime is 1920065813. The reversal of 1920065808 is 8085600291.

It is an interprime number because it is at equal distance from previous prime (1920065803) and next prime (1920065813).

It is not an unprimeable number, because it can be changed into a prime (1920065803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423291 + ... + 427802.

Almost surely, 2^1920065808 is an apocalyptic number.

It is an amenable number.

1920065808 is an abundant number, since it is smaller than the sum of its proper divisors (3145645680).

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

1920065808 is a wasteful number, since it uses less digits than its factorization.

1920065808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851151 (or 851145 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 1920065808 is about 43818.5555216052. Note that the first 4 decimals coincide. The cubic root of 1920065808 is about 1242.9072022719.

The spelling of 1920065808 in words is "one billion, nine hundred twenty million, sixty-five thousand, eight hundred eight".