6409406 has 16 divisors (see below), whose sum is σ = 10119600. Its totient is φ = 3040128.

The previous prime is 6409397. The next prime is 6409409. The reversal of 6409406 is 6049046.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6409409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2486 + ... + 4358.

It is an arithmetic number, because the mean of its divisors is an integer number (632475).

Almost surely, 2^6409406 is an apocalyptic number.

6409406 is a deficient number, since it is larger than the sum of its proper divisors (3710194).

6409406 is a wasteful number, since it uses less digits than its factorization.

6409406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6409406 is about 2531.6804695696. The cubic root of 6409406 is about 185.7544646232.

It can be divided in two parts, 6 and 409406, that multiplied together give a triangular number (2456436 = T₂₂₁₆).

The spelling of 6409406 in words is "six million, four hundred nine thousand, four hundred six".