199945600 has 48 divisors (see below), whose sum is σ = 493936020. Its totient is φ = 79976960.

The previous prime is 199945597. The next prime is 199945639. The reversal of 199945600 is 6549991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28042 + ... + 34441.

Almost surely, 2^199945600 is an apocalyptic number.

199945600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199945600 is an abundant number, since it is smaller than the sum of its proper divisors (293990420).

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

199945600 is an equidigital number, since it uses as much as digits as its factorization.

199945600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62507 (or 62490 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 199945600 is about 14140.2121624819. The cubic root of 199945600 is about 584.7505206462.

The spelling of 199945600 in words is "one hundred ninety-nine million, nine hundred forty-five thousand, six hundred".