6405696 has 112 divisors (see below), whose sum is σ = 20604480. Its totient is φ = 1935360.

The previous prime is 6405653. The next prime is 6405701. The reversal of 6405696 is 6965046.

It is a happy number.

6405696 is a `hidden beast` number, since 640 + 5 + 6 + 9 + 6 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6405696.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18840 + ... + 19176.

Almost surely, 2^6405696 is an apocalyptic number.

6405696 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6405696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10302240).

6405696 is an abundant number, since it is smaller than the sum of its proper divisors (14198784).

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

6405696 is a wasteful number, since it uses less digits than its factorization.

6405696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 6405696 is about 2530.9476486091. The cubic root of 6405696 is about 185.7186171996.

It can be divided in two parts, 640 and 5696, that added together give a palindrome (6336).

The spelling of 6405696 in words is "six million, four hundred five thousand, six hundred ninety-six".