638296198 has 8 divisors (see below), whose sum is σ = 960286392. Its totient is φ = 318200736.

The previous prime is 638296189. The next prime is 638296223. The reversal of 638296198 is 891692836.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 472840 + ... + 474187.

It is an arithmetic number, because the mean of its divisors is an integer number (120035799).

Almost surely, 2^638296198 is an apocalyptic number.

638296198 is a deficient number, since it is larger than the sum of its proper divisors (321990194).

638296198 is a wasteful number, since it uses less digits than its factorization.

638296198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947366.

The product of its digits is 1119744, while the sum is 52.

The square root of 638296198 is about 25264.5244958222. The cubic root of 638296198 is about 861.0084609389.

The spelling of 638296198 in words is "six hundred thirty-eight million, two hundred ninety-six thousand, one hundred ninety-eight".