8120385808 has 10 divisors (see below), whose sum is σ = 15733247534. Its totient is φ = 4060192896.

The previous prime is 8120385751. The next prime is 8120385809. The reversal of 8120385808 is 8085830218.

It can be written as a sum of positive squares in only one way, i.e., 6204397824 + 1915987984 = 78768^2 + 43772^2 .

It is not an unprimeable number, because it can be changed into a prime (8120385809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253762041 + ... + 253762072.

Almost surely, 2^8120385808 is an apocalyptic number.

It is an amenable number.

8120385808 is a deficient number, since it is larger than the sum of its proper divisors (7612861726).

8120385808 is a wasteful number, since it uses less digits than its factorization.

8120385808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507524121 (or 507524115 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The square root of 8120385808 is about 90113.1833196453. The cubic root of 8120385808 is about 2009.9822451671.

The spelling of 8120385808 in words is "eight billion, one hundred twenty million, three hundred eighty-five thousand, eight hundred eight".