381605056 has 28 divisors (see below), whose sum is σ = 865426768. Its totient is φ = 163544832.

The previous prime is 381605041. The next prime is 381605083. The reversal of 381605056 is 650506183.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425451 + ... + 426346.

Almost surely, 2^381605056 is an apocalyptic number.

It is an amenable number.

381605056 is an abundant number, since it is smaller than the sum of its proper divisors (483821712).

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

381605056 is an equidigital number, since it uses as much as digits as its factorization.

381605056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851816 (or 851806 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 381605056 is about 19534.7141263956. The cubic root of 381605056 is about 725.3340076527.

The spelling of 381605056 in words is "three hundred eighty-one million, six hundred five thousand, fifty-six".