8445252720 has 80 divisors (see below), whose sum is σ = 26474510880. Its totient is φ = 2226757632.

The previous prime is 8445252709. The next prime is 8445252721. The reversal of 8445252720 is 272525448.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8445252721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176329 + ... + 219048.

It is an arithmetic number, because the mean of its divisors is an integer number (330931386).

Almost surely, 2^8445252720 is an apocalyptic number.

8445252720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8445252720 is an abundant number, since it is smaller than the sum of its proper divisors (18029258160).

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

8445252720 is a wasteful number, since it uses less digits than its factorization.

8445252720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395482 (or 395476 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 39.

The square root of 8445252720 is about 91898.0561274285. The cubic root of 8445252720 is about 2036.4365510427.

The spelling of 8445252720 in words is "eight billion, four hundred forty-five million, two hundred fifty-two thousand, seven hundred twenty".