6402656 has 24 divisors (see below), whose sum is σ = 13575744. Its totient is φ = 2954880.

The previous prime is 6402653. The next prime is 6402661. The reversal of 6402656 is 6562046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402653) 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, 7280 + ... + 8111.

It is an arithmetic number, because the mean of its divisors is an integer number (565656).

Almost surely, 2^6402656 is an apocalyptic number.

It is an amenable number.

6402656 is an abundant number, since it is smaller than the sum of its proper divisors (7173088).

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

6402656 is a wasteful number, since it uses less digits than its factorization.

6402656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15414 (or 15406 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 6402656 is about 2530.3470117753. The cubic root of 6402656 is about 185.6892332507.

The spelling of 6402656 in words is "six million, four hundred two thousand, six hundred fifty-six".