2528872720 has 80 divisors (see below), whose sum is σ = 6421821120. Its totient is φ = 918489600.

The previous prime is 2528872711. The next prime is 2528872721. The reversal of 2528872720 is 272788252.

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

It is not an unprimeable number, because it can be changed into a prime (2528872721) 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, 1256515 + ... + 1258525.

It is an arithmetic number, because the mean of its divisors is an integer number (80272764).

Almost surely, 2^2528872720 is an apocalyptic number.

2528872720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2528872720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3210910560).

2528872720 is an abundant number, since it is smaller than the sum of its proper divisors (3892948400).

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

2528872720 is a wasteful number, since it uses less digits than its factorization.

2528872720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464 (or 3458 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 2528872720 is about 50287.8983454270. The cubic root of 2528872720 is about 1362.4136636369.

The spelling of 2528872720 in words is "two billion, five hundred twenty-eight million, eight hundred seventy-two thousand, seven hundred twenty".