388666883 has 6 divisors (see below), whose sum is σ = 427212492. Its totient is φ = 353333420.

The previous prime is 388666879. The next prime is 388666919.

388666883 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 388666883 - 2² = 388666879 is a prime.

It is a super-3 number, since 3×388666883³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388666813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1605941 + ... + 1606182.

It is an arithmetic number, because the mean of its divisors is an integer number (71202082).

Almost surely, 2^388666883 is an apocalyptic number.

388666883 is a deficient number, since it is larger than the sum of its proper divisors (38545609).

388666883 is a wasteful number, since it uses less digits than its factorization.

388666883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212145 (or 3212134 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 56.

The square root of 388666883 is about 19714.6362634465. The cubic root of 388666883 is about 729.7809332031.

The spelling of 388666883 in words is "three hundred eighty-eight million, six hundred sixty-six thousand, eight hundred eighty-three".