6403456 has 32 divisors (see below), whose sum is σ = 13433400. Its totient is φ = 3032064.

The previous prime is 6403451. The next prime is 6403469. The reversal of 6403456 is 6543046.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403451) 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, 1116 + ... + 3748.

Almost surely, 2^6403456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6403456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6716700).

6403456 is an abundant number, since it is smaller than the sum of its proper divisors (7029944).

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

6403456 is a wasteful number, since it uses less digits than its factorization.

6403456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666 (or 2654 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 6403456 is about 2530.5050879222. The cubic root of 6403456 is about 185.6969667704.

It can be divided in two parts, 6403 and 456, that added together give a cube (6859 = 19³).

The spelling of 6403456 in words is "six million, four hundred three thousand, four hundred fifty-six".