381659346 has 48 divisors (see below), whose sum is σ = 872108640. Its totient is φ = 120294720.

The previous prime is 381659303. The next prime is 381659347. The reversal of 381659346 is 643956183.

381659346 is a `hidden beast` number, since 3 + 8 + 16 + 593 + 46 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381659347) 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 23 ways as a sum of consecutive naturals, for example, 325341 + ... + 326511.

It is an arithmetic number, because the mean of its divisors is an integer number (18168930).

Almost surely, 2^381659346 is an apocalyptic number.

381659346 is an abundant number, since it is smaller than the sum of its proper divisors (490449294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381659346 is a wasteful number, since it uses less digits than its factorization.

381659346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151 (or 2148 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 381659346 is about 19536.1036545162. The cubic root of 381659346 is about 725.3684031753.

The spelling of 381659346 in words is "three hundred eighty-one million, six hundred fifty-nine thousand, three hundred forty-six".