199447450 has 24 divisors (see below), whose sum is σ = 371352348. Its totient is φ = 79697280.

The previous prime is 199447447. The next prime is 199447481. The reversal of 199447450 is 54744991.

It can be written as a sum of positive squares in 6 ways, for example, as 109558089 + 89889361 = 10467^2 + 9481^2 .

It is a junction number, because it is equal to n+sod(n) for n = 199447397 and 199447406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79414 + ... + 81886.

Almost surely, 2^199447450 is an apocalyptic number.

199447450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199447450 is a deficient number, since it is larger than the sum of its proper divisors (171904898).

199447450 is a wasteful number, since it uses less digits than its factorization.

199447450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098 (or 4093 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 199447450 is about 14122.5865194730. The cubic root of 199447450 is about 584.2644955816.

The spelling of 199447450 in words is "one hundred ninety-nine million, four hundred forty-seven thousand, four hundred fifty".