381388006 has 8 divisors (see below), whose sum is σ = 572736960. Its totient is φ = 190475688.

The previous prime is 381387997. The next prime is 381388039. The reversal of 381388006 is 600883183.

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

It is a super-2 number, since 2×381388006² = 290913622241312072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106966 + ... + 110473.

It is an arithmetic number, because the mean of its divisors is an integer number (71592120).

Almost surely, 2^381388006 is an apocalyptic number.

381388006 is a deficient number, since it is larger than the sum of its proper divisors (191348954).

381388006 is a wasteful number, since it uses less digits than its factorization.

381388006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218318.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 381388006 is about 19529.1578415455. The cubic root of 381388006 is about 725.1964626509.

It can be divided in two parts, 3813 and 88006, that added together give a palindrome (91819).

The spelling of 381388006 in words is "three hundred eighty-one million, three hundred eighty-eight thousand, six".