381885657 has 8 divisors (see below), whose sum is σ = 509274720. Its totient is φ = 254543520.

The previous prime is 381885643. The next prime is 381885677. The reversal of 381885657 is 756588183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381885657 - 2⁶ = 381885593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381885677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18094 + ... + 33032.

It is an arithmetic number, because the mean of its divisors is an integer number (63659340).

Almost surely, 2^381885657 is an apocalyptic number.

It is an amenable number.

381885657 is a deficient number, since it is larger than the sum of its proper divisors (127389063).

381885657 is a wasteful number, since it uses less digits than its factorization.

381885657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23463.

The product of its digits is 1612800, while the sum is 51.

The square root of 381885657 is about 19541.8949183543. The cubic root of 381885657 is about 725.5117477697.

The spelling of 381885657 in words is "three hundred eighty-one million, eight hundred eighty-five thousand, six hundred fifty-seven".