378409381 has 8 divisors (see below), whose sum is σ = 432921024. Its totient is φ = 324011040.

The previous prime is 378409379. The next prime is 378409387. The reversal of 378409381 is 183904873.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 378409381 - 2¹ = 378409379 is a prime.

It is a super-2 number, since 2×378409381² = 286387319257606322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378409387) 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 7 ways as a sum of consecutive naturals, for example, 21040 + ... + 34633.

It is an arithmetic number, because the mean of its divisors is an integer number (54115128).

Almost surely, 2^378409381 is an apocalyptic number.

It is an amenable number.

378409381 is a deficient number, since it is larger than the sum of its proper divisors (54511643).

378409381 is an equidigital number, since it uses as much as digits as its factorization.

378409381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56651.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 378409381 is about 19452.7473895077. The cubic root of 378409381 is about 723.3036079488.

The spelling of 378409381 in words is "three hundred seventy-eight million, four hundred nine thousand, three hundred eighty-one".