3728320044 has 12 divisors (see below), whose sum is σ = 8699413464. Its totient is φ = 1242773344.

The previous prime is 3728320009. The next prime is 3728320067. The reversal of 3728320044 is 4400238273.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 3728319987 and 3728320014.

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 3 ways as a sum of consecutive naturals, for example, 155346657 + ... + 155346680.

It is an arithmetic number, because the mean of its divisors is an integer number (724951122).

Almost surely, 2^3728320044 is an apocalyptic number.

It is an amenable number.

3728320044 is an abundant number, since it is smaller than the sum of its proper divisors (4971093420).

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

3728320044 is a wasteful number, since it uses less digits than its factorization.

3728320044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310693344 (or 310693342 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 3728320044 is about 61059.9708810936. The cubic root of 3728320044 is about 1550.6164795764.

The spelling of 3728320044 in words is "three billion, seven hundred twenty-eight million, three hundred twenty thousand, forty-four".