6400488 has 16 divisors (see below), whose sum is σ = 16001280. Its totient is φ = 2133488.

The previous prime is 6400453. The next prime is 6400489. The reversal of 6400488 is 8840046.

It is not an unprimeable number, because it can be changed into a prime (6400489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133320 + ... + 133367.

It is an arithmetic number, because the mean of its divisors is an integer number (1000080).

Almost surely, 2^6400488 is an apocalyptic number.

It is an amenable number.

6400488 is an abundant number, since it is smaller than the sum of its proper divisors (9600792).

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

6400488 is a wasteful number, since it uses less digits than its factorization.

6400488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266696 (or 266692 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 6400488 is about 2529.9185757648. The cubic root of 6400488 is about 185.6682721732.

The spelling of 6400488 in words is "six million, four hundred thousand, four hundred eighty-eight".