199444920 has 32 divisors (see below), whose sum is σ = 598335120. Its totient is φ = 53185280.

The previous prime is 199444913. The next prime is 199445009. The reversal of 199444920 is 29444991.

It is a super-2 number, since 2×199444920² = 79556552227612800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830901 + ... + 831140.

Almost surely, 2^199444920 is an apocalyptic number.

199444920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199444920 is an abundant number, since it is smaller than the sum of its proper divisors (398890200).

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

199444920 is a wasteful number, since it uses less digits than its factorization.

199444920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662055 (or 1662051 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 199444920 is about 14122.4969463619. The cubic root of 199444920 is about 584.2620250972.

The spelling of 199444920 in words is "one hundred ninety-nine million, four hundred forty-four thousand, nine hundred twenty".