199989240 has 64 divisors (see below), whose sum is σ = 654514560. Its totient is φ = 48481920.

The previous prime is 199989239. The next prime is 199989263. The reversal of 199989240 is 42989991.

It is a happy number.

It is a super-2 number, since 2×199989240² = 79991392231555200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 74434 + ... + 77073.

It is an arithmetic number, because the mean of its divisors is an integer number (10226790).

Almost surely, 2^199989240 is an apocalyptic number.

199989240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199989240 is an abundant number, since it is smaller than the sum of its proper divisors (454525320).

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

199989240 is a wasteful number, since it uses less digits than its factorization.

199989240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151532 (or 151528 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 51.

The square root of 199989240 is about 14141.7551951658. The cubic root of 199989240 is about 584.7930599775.

The spelling of 199989240 in words is "one hundred ninety-nine million, nine hundred eighty-nine thousand, two hundred forty".