386768381 has 4 divisors (see below), whose sum is σ = 392066652. Its totient is φ = 381470112.

The previous prime is 386768353. The next prime is 386768441. The reversal of 386768381 is 183867683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69572281 + 317196100 = 8341^2 + 17810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-386768381 is a prime.

It is a super-2 number, since 2×386768381² = 299179561082722322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386768281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2649026 + ... + 2649171.

It is an arithmetic number, because the mean of its divisors is an integer number (98016663).

Almost surely, 2^386768381 is an apocalyptic number.

It is an amenable number.

386768381 is a deficient number, since it is larger than the sum of its proper divisors (5298271).

386768381 is an equidigital number, since it uses as much as digits as its factorization.

386768381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298270.

The product of its digits is 1161216, while the sum is 50.

The square root of 386768381 is about 19666.4277640857. The cubic root of 386768381 is about 728.5907515481.

The spelling of 386768381 in words is "three hundred eighty-six million, seven hundred sixty-eight thousand, three hundred eighty-one".