381444791 has 8 divisors (see below), whose sum is σ = 469470624. Its totient is φ = 301802400.

The previous prime is 381444761. The next prime is 381444799. The reversal of 381444791 is 197444183.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381444791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381444799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2095760 + ... + 2095941.

It is an arithmetic number, because the mean of its divisors is an integer number (58683828).

Almost surely, 2^381444791 is an apocalyptic number.

381444791 is a deficient number, since it is larger than the sum of its proper divisors (88025833).

381444791 is a wasteful number, since it uses less digits than its factorization.

381444791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191721.

The product of its digits is 96768, while the sum is 41.

The square root of 381444791 is about 19530.6116391679. The cubic root of 381444791 is about 725.2324524539.

The spelling of 381444791 in words is "three hundred eighty-one million, four hundred forty-four thousand, seven hundred ninety-one".