378538447 has 4 divisors (see below), whose sum is σ = 432615376. Its totient is φ = 324461520.

The previous prime is 378538411. The next prime is 378538451. The reversal of 378538447 is 744835873.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 378538447 - 2⁷ = 378538319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 378538447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378538547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27038454 + ... + 27038467.

It is an arithmetic number, because the mean of its divisors is an integer number (108153844).

Almost surely, 2^378538447 is an apocalyptic number.

378538447 is a deficient number, since it is larger than the sum of its proper divisors (54076929).

378538447 is an equidigital number, since it uses as much as digits as its factorization.

378538447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54076928.

The product of its digits is 2257920, while the sum is 49.

The square root of 378538447 is about 19456.0645301150. The cubic root of 378538447 is about 723.3858322070.

The spelling of 378538447 in words is "three hundred seventy-eight million, five hundred thirty-eight thousand, four hundred forty-seven".