6405312 has 56 divisors (see below), whose sum is σ = 17217136. Its totient is φ = 2101248.

The previous prime is 6405283. The next prime is 6405331. The reversal of 6405312 is 2135046.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13788 + ... + 14244.

Almost surely, 2^6405312 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 6405312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8608568).

6405312 is an abundant number, since it is smaller than the sum of its proper divisors (10811824).

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

6405312 is a wasteful number, since it uses less digits than its factorization.

6405312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 6405312 is about 2530.8717865589. The cubic root of 6405312 is about 185.7149060560.

The spelling of 6405312 in words is "six million, four hundred five thousand, three hundred twelve".