381707505 has 32 divisors (see below), whose sum is σ = 681609600. Its totient is φ = 202671936.

The previous prime is 381707479. The next prime is 381707531. The reversal of 381707505 is 505707183.

381707505 is a `hidden beast` number, since 3 + 81 + 70 + 7 + 505 = 666.

It is an interprime number because it is at equal distance from previous prime (381707479) and next prime (381707531).

It is not a de Polignac number, because 381707505 - 2⁷ = 381707377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381707505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24742 + ... + 37088.

It is an arithmetic number, because the mean of its divisors is an integer number (21300300).

Almost surely, 2^381707505 is an apocalyptic number.

It is an amenable number.

381707505 is a deficient number, since it is larger than the sum of its proper divisors (299902095).

381707505 is a wasteful number, since it uses less digits than its factorization.

381707505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12590 (or 12584 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 381707505 is about 19537.3361797355. The cubic root of 381707505 is about 725.3989116624.

The spelling of 381707505 in words is "three hundred eighty-one million, seven hundred seven thousand, five hundred five".