381585805 has 8 divisors (see below), whose sum is σ = 465409944. Its totient is φ = 300264000.

The previous prime is 381585803. The next prime is 381585817. The reversal of 381585805 is 508585183.

It can be written as a sum of positive squares in 4 ways, for example, as 13060996 + 368524809 = 3614^2 + 19197^2 .

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

It is not a de Polignac number, because 381585805 - 2¹ = 381585803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381585803) 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, 625246 + ... + 625855.

It is an arithmetic number, because the mean of its divisors is an integer number (58176243).

Almost surely, 2^381585805 is an apocalyptic number.

It is an amenable number.

381585805 is a deficient number, since it is larger than the sum of its proper divisors (83824139).

381585805 is a wasteful number, since it uses less digits than its factorization.

381585805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251167.

The product of its (nonzero) digits is 192000, while the sum is 43.

The square root of 381585805 is about 19534.2213819748. The cubic root of 381585805 is about 725.3218103651.

The spelling of 381585805 in words is "three hundred eighty-one million, five hundred eighty-five thousand, eight hundred five".