6402406 has 16 divisors (see below), whose sum is σ = 9931680. Its totient is φ = 3093120.

The previous prime is 6402401. The next prime is 6402413. The reversal of 6402406 is 6042046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17655 + ... + 18013.

It is an arithmetic number, because the mean of its divisors is an integer number (620730).

Almost surely, 2^6402406 is an apocalyptic number.

6402406 is a deficient number, since it is larger than the sum of its proper divisors (3529274).

6402406 is a wasteful number, since it uses less digits than its factorization.

6402406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 6402406 is about 2530.2976109541. The cubic root of 6402406 is about 185.6868163936.

The spelling of 6402406 in words is "six million, four hundred two thousand, four hundred six".