387818 has 8 divisors (see below), whose sum is σ = 585120. Its totient is φ = 192780.

The previous prime is 387799. The next prime is 387839. The reversal of 387818 is 818783.

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

It is a super-2 number, since 2×387818² = 300805602248, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

387818 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38 + ... + 881.

It is an arithmetic number, because the mean of its divisors is an integer number (73140).

2³⁸⁷⁸¹⁸ is an apocalyptic number.

387818 is a deficient number, since it is larger than the sum of its proper divisors (197302).

387818 is a wasteful number, since it uses less digits than its factorization.

387818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132.

The product of its digits is 10752, while the sum is 35.

The square root of 387818 is about 622.7503512645. The cubic root of 387818 is about 72.9249243800.

Subtracting from 387818 its sum of digits (35), we obtain a palindrome (387783).

The spelling of 387818 in words is "three hundred eighty-seven thousand, eight hundred eighteen".