6484438728 has 48 divisors (see below), whose sum is σ = 17592054480. Its totient is φ = 2157783264.

The previous prime is 6484438721. The next prime is 6484438729. The reversal of 6484438728 is 8278344846.

It is a happy number.

6484438728 is a `hidden beast` number, since 64 + 84 + 438 + 72 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6484438721) 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, 34450 + ... + 118977.

It is an arithmetic number, because the mean of its divisors is an integer number (366501135).

Almost surely, 2^6484438728 is an apocalyptic number.

It is an amenable number.

6484438728 is an abundant number, since it is smaller than the sum of its proper divisors (11107615752).

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

6484438728 is a wasteful number, since it uses less digits than its factorization.

6484438728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154026 (or 154019 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 54.

The square root of 6484438728 is about 80526.0127412254. The cubic root of 6484438728 is about 1864.7650903614.

The spelling of 6484438728 in words is "six billion, four hundred eighty-four million, four hundred thirty-eight thousand, seven hundred twenty-eight".