5257721328 has 20 divisors (see below), whose sum is σ = 13582446888. Its totient is φ = 1752573760.

The previous prime is 5257721321. The next prime is 5257721353. The reversal of 5257721328 is 8231277525.

It is a self number, because there is not a number n which added to its sum of digits gives 5257721328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5257721321) by changing a digit.

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, 54767883 + ... + 54767978.

Almost surely, 2^5257721328 is an apocalyptic number.

It is an amenable number.

5257721328 is an abundant number, since it is smaller than the sum of its proper divisors (8324725560).

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

5257721328 is a wasteful number, since it uses less digits than its factorization.

5257721328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109535872 (or 109535866 counting only the distinct ones).

The product of its digits is 235200, while the sum is 42.

The square root of 5257721328 is about 72510.1463796619. The cubic root of 5257721328 is about 1738.8649540211.

The spelling of 5257721328 in words is "five billion, two hundred fifty-seven million, seven hundred twenty-one thousand, three hundred twenty-eight".