198125638 has 8 divisors (see below), whose sum is σ = 298017360. Its totient is φ = 98786520.

The previous prime is 198125623. The next prime is 198125647. The reversal of 198125638 is 836521891.

198125638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×198125638³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 198125594 and 198125603.

It is a congruent number.

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, 137253 + ... + 138688.

It is an arithmetic number, because the mean of its divisors is an integer number (37252170).

Almost surely, 2^198125638 is an apocalyptic number.

198125638 is a deficient number, since it is larger than the sum of its proper divisors (99891722).

198125638 is a wasteful number, since it uses less digits than its factorization.

198125638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276302.

The product of its digits is 103680, while the sum is 43.

The square root of 198125638 is about 14075.7109234312. The cubic root of 198125638 is about 582.9709214098.

The spelling of 198125638 in words is "one hundred ninety-eight million, one hundred twenty-five thousand, six hundred thirty-eight".