6399898 has 8 divisors (see below), whose sum is σ = 9611892. Its totient is φ = 3195936.

The previous prime is 6399889. The next prime is 6399917. The reversal of 6399898 is 8989936.

It can be written as a sum of positive squares in 2 ways, for example, as 5968249 + 431649 = 2443^2 + 657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736 + ... + 3652.

Almost surely, 2^6399898 is an apocalyptic number.

6399898 is a deficient number, since it is larger than the sum of its proper divisors (3211994).

6399898 is a wasteful number, since it uses less digits than its factorization.

6399898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016.

The product of its digits is 839808, while the sum is 52.

The square root of 6399898 is about 2529.8019685343. The cubic root of 6399898 is about 185.6625670016.

The spelling of 6399898 in words is "six million, three hundred ninety-nine thousand, eight hundred ninety-eight".