378419209 has 15 divisors (see below), whose sum is σ = 442577607. Its totient is φ = 323542296.

The previous prime is 378419203. The next prime is 378419227. The reversal of 378419209 is 902914873.

The square root of 378419209 is 19453.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 253605625 + 124813584 = 15925^2 + 11172^2 .

It is not a de Polignac number, because 378419209 - 2¹⁵ = 378386441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378419203) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 952999 + ... + 953395.

Almost surely, 2^378419209 is an apocalyptic number.

378419209 is the 19453-rd square number.

378419209 is the 9727-th centered octagonal number.

It is an amenable number.

378419209 is a deficient number, since it is larger than the sum of its proper divisors (64158398).

378419209 is an frugal number, since it uses more digits than its factorization.

378419209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The cubic root of 378419209 is about 723.3098697442.

The spelling of 378419209 in words is "three hundred seventy-eight million, four hundred nineteen thousand, two hundred nine".