378334381 has 4 divisors (see below), whose sum is σ = 378380700. Its totient is φ = 378288064.

The previous prime is 378334357. The next prime is 378334387. The reversal of 378334381 is 183433873.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 20557156 + 357777225 = 4534^2 + 18915^2 .

It is a cyclic number.

It is not a de Polignac number, because 378334381 - 2¹³ = 378326189 is a prime.

It is a super-2 number, since 2×378334381² = 286273807693306322, 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 (378334387) 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, 7276 + ... + 28453.

It is an arithmetic number, because the mean of its divisors is an integer number (94595175).

Almost surely, 2^378334381 is an apocalyptic number.

It is an amenable number.

378334381 is a deficient number, since it is larger than the sum of its proper divisors (46319).

378334381 is a wasteful number, since it uses less digits than its factorization.

378334381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46318.

The product of its digits is 145152, while the sum is 40.

The square root of 378334381 is about 19450.8195457158. The cubic root of 378334381 is about 723.2558190041.

The spelling of 378334381 in words is "three hundred seventy-eight million, three hundred thirty-four thousand, three hundred eighty-one".