199450378 has 8 divisors (see below), whose sum is σ = 299250468. Its totient is φ = 99700224.

The previous prime is 199450301. The next prime is 199450379. The reversal of 199450378 is 873054991.

It is a happy number.

199450378 is a nontrivial binomial coefficient, being equal to C(19973, 2).

It can be written as a sum of positive squares in 2 ways, for example, as 195636169 + 3814209 = 13987^2 + 1953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×199450378³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (199450379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 19972.

Almost surely, 2^199450378 is an apocalyptic number.

199450378 is the 19972-nd triangular number.

199450378 is the 6658-th centered nonagonal number.

199450378 is a deficient number, since it is larger than the sum of its proper divisors (99800090).

199450378 is a wasteful number, since it uses less digits than its factorization.

199450378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24968.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 199450378 is about 14122.6901828228. The cubic root of 199450378 is about 584.2673546774.

The spelling of 199450378 in words is "one hundred ninety-nine million, four hundred fifty thousand, three hundred seventy-eight".