199843960 has 16 divisors (see below), whose sum is σ = 449649000. Its totient is φ = 79937568.

The previous prime is 199843951. The next prime is 199843981. The reversal of 199843960 is 69348991.

199843960 = T₁₁₅₄₁ + T₁₁₅₄₂ + T₁₁₅₄₃.

199843960 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2498010 + ... + 2498089.

Almost surely, 2^199843960 is an apocalyptic number.

199843960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199843960 is the 11543-rd centered triangular number.

It is an amenable number.

199843960 is an abundant number, since it is smaller than the sum of its proper divisors (249805040).

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

199843960 is a wasteful number, since it uses less digits than its factorization.

199843960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4996110 (or 4996106 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 199843960 is about 14136.6177001431. The cubic root of 199843960 is about 584.6514201631.

The spelling of 199843960 in words is "one hundred ninety-nine million, eight hundred forty-three thousand, nine hundred sixty".