80440004420 has 24 divisors (see below), whose sum is σ = 169101304344. Its totient is φ = 32142231296.

The previous prime is 80440004419. The next prime is 80440004459. The reversal of 80440004420 is 2440004408.

It can be written as a sum of positive squares in 4 ways, for example, as 11245754116 + 69194250304 = 106046^2 + 263048^2 .

It is a super-2 number, since 2×80440004420² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80440004420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2091119 + ... + 2129238.

It is an arithmetic number, because the mean of its divisors is an integer number (7045887681).

Almost surely, 2^80440004420 is an apocalyptic number.

It is an amenable number.

80440004420 is an abundant number, since it is smaller than the sum of its proper divisors (88661299924).

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

80440004420 is a wasteful number, since it uses less digits than its factorization.

80440004420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221319 (or 4221317 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 80440004420 its reverse (2440004408), we get a palindrome (82880008828).

The spelling of 80440004420 in words is "eighty billion, four hundred forty million, four thousand, four hundred twenty".