198439644 has 24 divisors (see below), whose sum is σ = 498643600. Its totient is φ = 61058304.

The previous prime is 198439573. The next prime is 198439673. The reversal of 198439644 is 446934891.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 198439593 and 198439602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635869 + ... + 636180.

Almost surely, 2^198439644 is an apocalyptic number.

It is an amenable number.

198439644 is an abundant number, since it is smaller than the sum of its proper divisors (300203956).

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

198439644 is a wasteful number, since it uses less digits than its factorization.

198439644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272069 (or 1272067 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 198439644 is about 14086.8606864695. The cubic root of 198439644 is about 583.2787391265.

The spelling of 198439644 in words is "one hundred ninety-eight million, four hundred thirty-nine thousand, six hundred forty-four".