199442420 has 24 divisors (see below), whose sum is σ = 425930400. Its totient is φ = 78424352.

The previous prime is 199442417. The next prime is 199442431. The reversal of 199442420 is 24244991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83330 + ... + 85689.

It is an arithmetic number, because the mean of its divisors is an integer number (17747100).

Almost surely, 2^199442420 is an apocalyptic number.

199442420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199442420 is an abundant number, since it is smaller than the sum of its proper divisors (226487980).

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

199442420 is a wasteful number, since it uses less digits than its factorization.

199442420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169087 (or 169085 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 199442420 is about 14122.4084348244. The cubic root of 199442420 is about 584.2595838866.

The spelling of 199442420 in words is "one hundred ninety-nine million, four hundred forty-two thousand, four hundred twenty".