7720440052 has 24 divisors (see below), whose sum is σ = 14557900392. Its totient is φ = 3561360000.

The previous prime is 7720440037. The next prime is 7720440053. The reversal of 7720440052 is 2500440277.

It can be written as a sum of positive squares in 4 ways, for example, as 162919696 + 7557520356 = 12764^2 + 86934^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7720439996 and 7720440023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720440053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59802 + ... + 137902.

It is an arithmetic number, because the mean of its divisors is an integer number (606579183).

Almost surely, 2^7720440052 is an apocalyptic number.

It is an amenable number.

7720440052 is a deficient number, since it is larger than the sum of its proper divisors (6837460340).

7720440052 is a wasteful number, since it uses less digits than its factorization.

7720440052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80019 (or 80017 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 7720440052 is about 87866.0346891790. The cubic root of 7720440052 is about 1976.4265761695.

The spelling of 7720440052 in words is "seven billion, seven hundred twenty million, four hundred forty thousand, fifty-two".