381856361 has 8 divisors (see below), whose sum is σ = 392131584. Its totient is φ = 371694960.

The previous prime is 381856339. The next prime is 381856399. The reversal of 381856361 is 163658183.

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 381856361 - 2¹⁰ = 381855337 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381856561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21635 + ... + 35096.

It is an arithmetic number, because the mean of its divisors is an integer number (49016448).

Almost surely, 2^381856361 is an apocalyptic number.

It is an amenable number.

381856361 is a deficient number, since it is larger than the sum of its proper divisors (10275223).

381856361 is a wasteful number, since it uses less digits than its factorization.

381856361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56911.

The product of its digits is 103680, while the sum is 41.

The square root of 381856361 is about 19541.1453349081. The cubic root of 381856361 is about 725.4931949776.

The spelling of 381856361 in words is "three hundred eighty-one million, eight hundred fifty-six thousand, three hundred sixty-one".