6552388728 has 80 divisors (see below), whose sum is σ = 18699131880. Its totient is φ = 2142908352.

The previous prime is 6552388723. The next prime is 6552388729. The reversal of 6552388728 is 8278832556.

6552388728 is a `hidden beast` number, since 6 + 552 + 3 + 8 + 87 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6552388723) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 61050 + ... + 129737.

Almost surely, 2^6552388728 is an apocalyptic number.

It is an amenable number.

6552388728 is an abundant number, since it is smaller than the sum of its proper divisors (12146743152).

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

6552388728 is a wasteful number, since it uses less digits than its factorization.

6552388728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190858 (or 190845 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The square root of 6552388728 is about 80946.8265468141. The cubic root of 6552388728 is about 1871.2560530083.

The spelling of 6552388728 in words is "six billion, five hundred fifty-two million, three hundred eighty-eight thousand, seven hundred twenty-eight".