198969894 has 48 divisors (see below), whose sum is σ = 442091520. Its totient is φ = 64644720.

The previous prime is 198969863. The next prime is 198969907. The reversal of 198969894 is 498969891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404989 + ... + 405479.

It is an arithmetic number, because the mean of its divisors is an integer number (9210240).

Almost surely, 2^198969894 is an apocalyptic number.

198969894 is an abundant number, since it is smaller than the sum of its proper divisors (243121626).

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

198969894 is a wasteful number, since it uses less digits than its factorization.

198969894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 1022 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 198969894 is about 14105.6688604263. The cubic root of 198969894 is about 583.7978028829.

The spelling of 198969894 in words is "one hundred ninety-eight million, nine hundred sixty-nine thousand, eight hundred ninety-four".