198993894 has 16 divisors (see below), whose sum is σ = 434168640. Its totient is φ = 60301160.

The previous prime is 198993841. The next prime is 198993913. The reversal of 198993894 is 498399891.

It is a happy number.

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, 1507464 + ... + 1507595.

It is an arithmetic number, because the mean of its divisors is an integer number (27135540).

Almost surely, 2^198993894 is an apocalyptic number.

198993894 is an abundant number, since it is smaller than the sum of its proper divisors (235174746).

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

198993894 is a wasteful number, since it uses less digits than its factorization.

198993894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015075.

The product of its digits is 5038848, while the sum is 60.

The square root of 198993894 is about 14106.5195565738. The cubic root of 198993894 is about 583.8212747487.

The spelling of 198993894 in words is "one hundred ninety-eight million, nine hundred ninety-three thousand, eight hundred ninety-four".