6399654 has 16 divisors (see below), whose sum is σ = 12859392. Its totient is φ = 2123208.

The previous prime is 6399643. The next prime is 6399677. The reversal of 6399654 is 4569936.

It is a congruent number.

It is an unprimeable number.

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, 1054 + ... + 3729.

It is an arithmetic number, because the mean of its divisors is an integer number (803712).

Almost surely, 2^6399654 is an apocalyptic number.

6399654 is an abundant number, since it is smaller than the sum of its proper divisors (6459738).

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

6399654 is a wasteful number, since it uses less digits than its factorization.

6399654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011.

The product of its digits is 174960, while the sum is 42.

The square root of 6399654 is about 2529.7537429560. The cubic root of 6399654 is about 185.6602074723.

The spelling of 6399654 in words is "six million, three hundred ninety-nine thousand, six hundred fifty-four".