8120799442 has 32 divisors (see below), whose sum is σ = 14315627520. Its totient is φ = 3382015680.

The previous prime is 8120799419. The next prime is 8120799461. The reversal of 8120799442 is 2449970218.

It is a super-2 number, since 2×8120799442² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8120799392 and 8120799401.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 419967 + ... + 438877.

It is an arithmetic number, because the mean of its divisors is an integer number (447363360).

Almost surely, 2^8120799442 is an apocalyptic number.

8120799442 is a deficient number, since it is larger than the sum of its proper divisors (6194828078).

8120799442 is a wasteful number, since it uses less digits than its factorization.

8120799442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19786.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 8120799442 is about 90115.4783708104. The cubic root of 8120799442 is about 2010.0163725637.

The spelling of 8120799442 in words is "eight billion, one hundred twenty million, seven hundred ninety-nine thousand, four hundred forty-two".