198429864 has 64 divisors (see below), whose sum is σ = 518538240. Its totient is φ = 63215040.

The previous prime is 198429839. The next prime is 198429929. The reversal of 198429864 is 468924891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46459 + ... + 50549.

It is an arithmetic number, because the mean of its divisors is an integer number (8102160).

Almost surely, 2^198429864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198429864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259269120).

198429864 is an abundant number, since it is smaller than the sum of its proper divisors (320108376).

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

198429864 is a wasteful number, since it uses less digits than its factorization.

198429864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4190 (or 4186 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 198429864 is about 14086.5135502011. The cubic root of 198429864 is about 583.2691567674.

The spelling of 198429864 in words is "one hundred ninety-eight million, four hundred twenty-nine thousand, eight hundred sixty-four".