381923841 has 32 divisors (see below), whose sum is σ = 560770560. Its totient is φ = 229791744.

The previous prime is 381923837. The next prime is 381923851. The reversal of 381923841 is 148329183.

It is not a de Polignac number, because 381923841 - 2² = 381923837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 381923841.

It is not an unprimeable number, because it can be changed into a prime (381923851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347605 + ... + 348701.

It is an arithmetic number, because the mean of its divisors is an integer number (17524080).

Almost surely, 2^381923841 is an apocalyptic number.

It is an amenable number.

381923841 is a deficient number, since it is larger than the sum of its proper divisors (178846719).

381923841 is a wasteful number, since it uses less digits than its factorization.

381923841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305.

The product of its digits is 41472, while the sum is 39.

The square root of 381923841 is about 19542.8718718616. The cubic root of 381923841 is about 725.5359277975.

The spelling of 381923841 in words is "three hundred eighty-one million, nine hundred twenty-three thousand, eight hundred forty-one".