381823871 has 16 divisors (see below), whose sum is σ = 454906368. Its totient is φ = 315890400.

The previous prime is 381823861. The next prime is 381823877. The reversal of 381823871 is 178328183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381823871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381823877) 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 15 ways as a sum of consecutive naturals, for example, 8651 + ... + 28956.

It is an arithmetic number, because the mean of its divisors is an integer number (28431648).

Almost surely, 2^381823871 is an apocalyptic number.

381823871 is a deficient number, since it is larger than the sum of its proper divisors (73082497).

381823871 is a wasteful number, since it uses less digits than its factorization.

381823871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37702.

The product of its digits is 64512, while the sum is 41.

The square root of 381823871 is about 19540.3139944065. The cubic root of 381823871 is about 725.4726183552.

The spelling of 381823871 in words is "three hundred eighty-one million, eight hundred twenty-three thousand, eight hundred seventy-one".