381766371 has 16 divisors (see below), whose sum is σ = 582280704. Its totient is φ = 217949184.

The previous prime is 381766369. The next prime is 381766417. The reversal of 381766371 is 173667183.

It is not a de Polignac number, because 381766371 - 2¹ = 381766369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381766171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16330 + ... + 32096.

It is an arithmetic number, because the mean of its divisors is an integer number (36392544).

Almost surely, 2^381766371 is an apocalyptic number.

381766371 is a deficient number, since it is larger than the sum of its proper divisors (200514333).

381766371 is a wasteful number, since it uses less digits than its factorization.

381766371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16930.

The product of its digits is 127008, while the sum is 42.

The square root of 381766371 is about 19538.8426218136. The cubic root of 381766371 is about 725.4361994957.

The spelling of 381766371 in words is "three hundred eighty-one million, seven hundred sixty-six thousand, three hundred seventy-one".