198639036 has 18 divisors (see below), whose sum is σ = 502115432. Its totient is φ = 66213000.

The previous prime is 198639031. The next prime is 198639047. The reversal of 198639036 is 630936891.

198639036 is a `hidden beast` number, since 1 + 9 + 8 + 639 + 0 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 198638982 and 198639000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198639031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2758840 + ... + 2758911.

Almost surely, 2^198639036 is an apocalyptic number.

It is an amenable number.

198639036 is an abundant number, since it is smaller than the sum of its proper divisors (303476396).

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

198639036 is a wasteful number, since it uses less digits than its factorization.

198639036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517761 (or 5517756 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 198639036 is about 14093.9361428949. The cubic root of 198639036 is about 583.4740330719.

The spelling of 198639036 in words is "one hundred ninety-eight million, six hundred thirty-nine thousand, thirty-six".