6450728 has 48 divisors (see below), whose sum is σ = 13507200. Its totient is φ = 2877120.

The previous prime is 6450727. The next prime is 6450733. The reversal of 6450728 is 8270546.

6450728 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×6450728² = 83223783459968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6450694 and 6450703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6450727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174326 + ... + 174362.

It is an arithmetic number, because the mean of its divisors is an integer number (281400).

Almost surely, 2^6450728 is an apocalyptic number.

It is an amenable number.

6450728 is an abundant number, since it is smaller than the sum of its proper divisors (7056472).

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

6450728 is a wasteful number, since it uses less digits than its factorization.

6450728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 89 counting only the distinct ones).

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

The square root of 6450728 is about 2539.8283406561. The cubic root of 6450728 is about 186.1528015577.

The spelling of 6450728 in words is "six million, four hundred fifty thousand, seven hundred twenty-eight".