381767845 has 16 divisors (see below), whose sum is σ = 463034880. Its totient is φ = 302157184.

The previous prime is 381767843. The next prime is 381767857. The reversal of 381767845 is 548767183.

It is a happy number.

It is not a de Polignac number, because 381767845 - 2¹ = 381767843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381767843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198609 + ... + 200521.

It is an arithmetic number, because the mean of its divisors is an integer number (28939680).

Almost surely, 2^381767845 is an apocalyptic number.

It is an amenable number.

381767845 is a deficient number, since it is larger than the sum of its proper divisors (81267035).

381767845 is a wasteful number, since it uses less digits than its factorization.

381767845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2324.

The product of its digits is 1128960, while the sum is 49.

The square root of 381767845 is about 19538.8803415139. The cubic root of 381767845 is about 725.4371331309.

The spelling of 381767845 in words is "three hundred eighty-one million, seven hundred sixty-seven thousand, eight hundred forty-five".