198429894 has 24 divisors (see below), whose sum is σ = 463003632. Its totient is φ = 61055280.

The previous prime is 198429839. The next prime is 198429929. The reversal of 198429894 is 498924891.

It is a self number, because there is not a number n which added to its sum of digits gives 198429894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423762 + ... + 424229.

It is an arithmetic number, because the mean of its divisors is an integer number (19291818).

Almost surely, 2^198429894 is an apocalyptic number.

198429894 is an abundant number, since it is smaller than the sum of its proper divisors (264573738).

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

198429894 is a wasteful number, since it uses less digits than its factorization.

198429894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848012 (or 848009 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 198429894 is about 14086.5146150494. The cubic root of 198429894 is about 583.2691861616.

It can be divided in two parts, 1984 and 29894, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 198429894 in words is "one hundred ninety-eight million, four hundred twenty-nine thousand, eight hundred ninety-four".