198219940 has 48 divisors (see below), whose sum is σ = 426202560. Its totient is φ = 77413760.

The previous prime is 198219937. The next prime is 198219997. The reversal of 198219940 is 49912891.

It is a happy number.

It is a super-2 number, since 2×198219940² = 78582289227207200, which contains 22 as substring.

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, 203655 + ... + 204625.

It is an arithmetic number, because the mean of its divisors is an integer number (8879220).

Almost surely, 2^198219940 is an apocalyptic number.

198219940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198219940 is an abundant number, since it is smaller than the sum of its proper divisors (227982620).

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

198219940 is a wasteful number, since it uses less digits than its factorization.

198219940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 198219940 is about 14079.0603379629. The cubic root of 198219940 is about 583.0633990996.

The spelling of 198219940 in words is "one hundred ninety-eight million, two hundred nineteen thousand, nine hundred forty".