8120204440 has 16 divisors (see below), whose sum is σ = 18270460080. Its totient is φ = 3248081760.

The previous prime is 8120204437. The next prime is 8120204453. The reversal of 8120204440 is 444020218.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 101502516 + ... + 101502595.

It is an arithmetic number, because the mean of its divisors is an integer number (1141903755).

Almost surely, 2^8120204440 is an apocalyptic number.

It is an amenable number.

8120204440 is an abundant number, since it is smaller than the sum of its proper divisors (10150255640).

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

8120204440 is a wasteful number, since it uses less digits than its factorization.

8120204440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203005122 (or 203005118 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 8120204440 is about 90112.1769795847. The cubic root of 8120204440 is about 2009.9672808053.

Adding to 8120204440 its reverse (444020218), we get a palindrome (8564224658).

The spelling of 8120204440 in words is "eight billion, one hundred twenty million, two hundred four thousand, four hundred forty".