6728509056 has 64 divisors (see below), whose sum is σ = 18649696320. Its totient is φ = 2145318912.

The previous prime is 6728509031. The next prime is 6728509063. The reversal of 6728509056 is 6509058276.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×6728509056² = 90545668233348022272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 6728508996 and 6728509014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372085 + ... + 389748.

It is an arithmetic number, because the mean of its divisors is an integer number (291401505).

Almost surely, 2^6728509056 is an apocalyptic number.

It is an amenable number.

6728509056 is an abundant number, since it is smaller than the sum of its proper divisors (11921187264).

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

6728509056 is a wasteful number, since it uses less digits than its factorization.

6728509056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761873 (or 761861 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The square root of 6728509056 is about 82027.4896360970. The cubic root of 6728509056 is about 1887.8737467044.

The spelling of 6728509056 in words is "six billion, seven hundred twenty-eight million, five hundred nine thousand, fifty-six".