388381166 has 32 divisors (see below), whose sum is σ = 637956000. Its totient is φ = 176625792.

The previous prime is 388381141. The next prime is 388381183. The reversal of 388381166 is 661183883.

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 15 ways as a sum of consecutive naturals, for example, 216200 + ... + 217988.

It is an arithmetic number, because the mean of its divisors is an integer number (19936125).

Almost surely, 2^388381166 is an apocalyptic number.

388381166 is a deficient number, since it is larger than the sum of its proper divisors (249574834).

388381166 is a wasteful number, since it uses less digits than its factorization.

388381166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036.

The product of its digits is 165888, while the sum is 44.

The square root of 388381166 is about 19707.3886144258. The cubic root of 388381166 is about 729.6020637201.

It can be divided in two parts, 38838 and 1166, that added together give a palindrome (40004).

The spelling of 388381166 in words is "three hundred eighty-eight million, three hundred eighty-one thousand, one hundred sixty-six".