7720445888 has 28 divisors (see below), whose sum is σ = 15848548440. Its totient is φ = 3727110912.

The previous prime is 7720445881. The next prime is 7720445927. The reversal of 7720445888 is 8885440277.

It is a super-2 number, since 2×7720445888² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720445881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078006 + ... + 2081717.

Almost surely, 2^7720445888 is an apocalyptic number.

It is an amenable number.

7720445888 is an abundant number, since it is smaller than the sum of its proper divisors (8128102552).

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

7720445888 is a wasteful number, since it uses less digits than its factorization.

7720445888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159764 (or 4159754 counting only the distinct ones).

The product of its (nonzero) digits is 4014080, while the sum is 53.

The square root of 7720445888 is about 87866.0678988197. The cubic root of 7720445888 is about 1976.4270741732.

The spelling of 7720445888 in words is "seven billion, seven hundred twenty million, four hundred forty-five thousand, eight hundred eighty-eight".