381807365 has 8 divisors (see below), whose sum is σ = 458498040. Its totient is φ = 305226432.

The previous prime is 381807343. The next prime is 381807397. The reversal of 381807365 is 563708183.

It can be written as a sum of positive squares in 4 ways, for example, as 6145441 + 375661924 = 2479^2 + 19382^2 .

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 381807365 - 2¹² = 381803269 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19574 + ... + 33863.

It is an arithmetic number, because the mean of its divisors is an integer number (57312255).

Almost surely, 2^381807365 is an apocalyptic number.

It is an amenable number.

381807365 is a deficient number, since it is larger than the sum of its proper divisors (76690675).

381807365 is a wasteful number, since it uses less digits than its factorization.

381807365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54871.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 381807365 is about 19539.8916322481. The cubic root of 381807365 is about 725.4621642999.

The spelling of 381807365 in words is "three hundred eighty-one million, eight hundred seven thousand, three hundred sixty-five".