387381366 has 48 divisors (see below), whose sum is σ = 891687888. Its totient is φ = 125971200.

The previous prime is 387381307. The next prime is 387381377. The reversal of 387381366 is 663183783.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10206 + ... + 29646.

It is an arithmetic number, because the mean of its divisors is an integer number (18576831).

Almost surely, 2^387381366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387381366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445843944).

387381366 is an abundant number, since it is smaller than the sum of its proper divisors (504306522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

387381366 is a wasteful number, since it uses less digits than its factorization.

387381366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19499 (or 19487 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 387381366 is about 19682.0061477483. The cubic root of 387381366 is about 728.9754602317.

It can be divided in two parts, 38738 and 1366, that added together give a palindrome (40104).

The spelling of 387381366 in words is "three hundred eighty-seven million, three hundred eighty-one thousand, three hundred sixty-six".