6464728 has 32 divisors (see below), whose sum is σ = 12571200. Its totient is φ = 3115008.

The previous prime is 6464723. The next prime is 6464729. The reversal of 6464728 is 8274646.

It is a super-2 number, since 2×6464728² = 83585416227968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33400 + ... + 33592.

It is an arithmetic number, because the mean of its divisors is an integer number (392850).

Almost surely, 2^6464728 is an apocalyptic number.

It is an amenable number.

6464728 is a deficient number, since it is larger than the sum of its proper divisors (6106472).

6464728 is a wasteful number, since it uses less digits than its factorization.

6464728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 327 counting only the distinct ones).

The product of its digits is 64512, while the sum is 37.

The square root of 6464728 is about 2542.5829386669. The cubic root of 6464728 is about 186.2873732487.

The spelling of 6464728 in words is "six million, four hundred sixty-four thousand, seven hundred twenty-eight".