381863647 has 8 divisors (see below), whose sum is σ = 416812032. Its totient is φ = 346954200.

The previous prime is 381863623. The next prime is 381863659. The reversal of 381863647 is 746368183.

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

It is a cyclic number.

It is not a de Polignac number, because 381863647 - 2¹⁵ = 381830879 is a prime.

It is a super-3 number, since 3×381863647³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381863597 and 381863606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381863617) 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 7 ways as a sum of consecutive naturals, for example, 13122 + ... + 30592.

It is an arithmetic number, because the mean of its divisors is an integer number (52101504).

Almost surely, 2^381863647 is an apocalyptic number.

381863647 is a deficient number, since it is larger than the sum of its proper divisors (34948385).

381863647 is a wasteful number, since it uses less digits than its factorization.

381863647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19469.

The product of its digits is 580608, while the sum is 46.

The square root of 381863647 is about 19541.3317611671. The cubic root of 381863647 is about 725.4978091993.

The spelling of 381863647 in words is "three hundred eighty-one million, eight hundred sixty-three thousand, six hundred forty-seven".