381528717 has 8 divisors (see below), whose sum is σ = 508905696. Its totient is φ = 254252112.

The previous prime is 381528713. The next prime is 381528731. The reversal of 381528717 is 717825183.

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

It is not a de Polignac number, because 381528717 - 2² = 381528713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381528713) 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, 15723 + ... + 31784.

It is an arithmetic number, because the mean of its divisors is an integer number (63613212).

Almost surely, 2^381528717 is an apocalyptic number.

It is an amenable number.

381528717 is a deficient number, since it is larger than the sum of its proper divisors (127376979).

381528717 is a wasteful number, since it uses less digits than its factorization.

381528717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50187.

The product of its digits is 94080, while the sum is 42.

The square root of 381528717 is about 19532.7600968220. The cubic root of 381528717 is about 725.2856374292.

The spelling of 381528717 in words is "three hundred eighty-one million, five hundred twenty-eight thousand, seven hundred seventeen".