6504728 has 8 divisors (see below), whose sum is σ = 12196380. Its totient is φ = 3252360.

The previous prime is 6504697. The next prime is 6504737. The reversal of 6504728 is 8274056.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×6504728² = 84622972707968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6504694 and 6504703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406538 + ... + 406553.

Almost surely, 2^6504728 is an apocalyptic number.

It is an amenable number.

6504728 is a deficient number, since it is larger than the sum of its proper divisors (5691652).

6504728 is a wasteful number, since it uses less digits than its factorization.

6504728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813097 (or 813093 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 6504728 is about 2550.4368253301. The cubic root of 6504728 is about 186.6707963939.

The spelling of 6504728 in words is "six million, five hundred four thousand, seven hundred twenty-eight".