6400004 has 12 divisors (see below), whose sum is σ = 12061644. Its totient is φ = 2953824.

The previous prime is 6399971. The next prime is 6400013. The reversal of 6400004 is 4000046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1768900 + 4631104 = 1330^2 + 2152^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61487 + ... + 61590.

It is an arithmetic number, because the mean of its divisors is an integer number (1005137).

Almost surely, 2^6400004 is an apocalyptic number.

It is an amenable number.

6400004 is a deficient number, since it is larger than the sum of its proper divisors (5661640).

6400004 is a wasteful number, since it uses less digits than its factorization.

6400004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123094 (or 123092 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 6400004 is about 2529.8229187040. The cubic root of 6400004 is about 185.6635920244.

It can be divided in two parts, 640000 and 4, that multiplied together give a 4-th power (2560000 = 40⁴).

The spelling of 6400004 in words is "six million, four hundred thousand, four".