198429980 has 48 divisors (see below), whose sum is σ = 484323840. Its totient is φ = 66877248.

The previous prime is 198429943. The next prime is 198429983. The reversal of 198429980 is 89924891.

It is a happy number.

It is a super-4 number, since 4×198429980⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198429983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3752 + ... + 20271.

It is an arithmetic number, because the mean of its divisors is an integer number (10090080).

Almost surely, 2^198429980 is an apocalyptic number.

198429980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198429980 is an abundant number, since it is smaller than the sum of its proper divisors (285893860).

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

198429980 is a wasteful number, since it uses less digits than its factorization.

198429980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24098 (or 24096 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 198429980 is about 14086.5176676140. The cubic root of 198429980 is about 583.2692704251.

The spelling of 198429980 in words is "one hundred ninety-eight million, four hundred twenty-nine thousand, nine hundred eighty".