6402838 has 16 divisors (see below), whose sum is σ = 10463040. Its totient is φ = 2920896.

The previous prime is 6402817. The next prime is 6402839. The reversal of 6402838 is 8382046.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402839) 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, 931 + ... + 3697.

It is an arithmetic number, because the mean of its divisors is an integer number (653940).

Almost surely, 2^6402838 is an apocalyptic number.

6402838 is a deficient number, since it is larger than the sum of its proper divisors (4060202).

6402838 is a wasteful number, since it uses less digits than its factorization.

6402838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 6402838 is about 2530.3829749664. The cubic root of 6402838 is about 185.6909926830.

The spelling of 6402838 in words is "six million, four hundred two thousand, eight hundred thirty-eight".