6440748 has 12 divisors (see below), whose sum is σ = 15028440. Its totient is φ = 2146912.

The previous prime is 6440747. The next prime is 6440771. The reversal of 6440748 is 8470446.

6440748 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (6440747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268353 + ... + 268376.

It is an arithmetic number, because the mean of its divisors is an integer number (1252370).

Almost surely, 2^6440748 is an apocalyptic number.

It is an amenable number.

6440748 is an abundant number, since it is smaller than the sum of its proper divisors (8587692).

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

6440748 is a wasteful number, since it uses less digits than its factorization.

6440748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536736 (or 536734 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 6440748 is about 2537.8628804567. The cubic root of 6440748 is about 186.0567522507.

The spelling of 6440748 in words is "six million, four hundred forty thousand, seven hundred forty-eight".