381957867 has 12 divisors (see below), whose sum is σ = 551886504. Its totient is φ = 254560320.

The previous prime is 381957859. The next prime is 381957871. The reversal of 381957867 is 768759183.

381957867 is a `hidden beast` number, since 3 + 8 + 1 + 9 + 578 + 67 = 666.

It is not a de Polignac number, because 381957867 - 2³ = 381957859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381950867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52483 + ... + 59315.

It is an arithmetic number, because the mean of its divisors is an integer number (45990542).

Almost surely, 2^381957867 is an apocalyptic number.

381957867 is a deficient number, since it is larger than the sum of its proper divisors (169928637).

381957867 is a wasteful number, since it uses less digits than its factorization.

381957867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13050 (or 13047 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 381957867 is about 19543.7424000625. The cubic root of 381957867 is about 725.5574734127.

The spelling of 381957867 in words is "three hundred eighty-one million, nine hundred fifty-seven thousand, eight hundred sixty-seven".