383866 has 12 divisors (see below), whose sum is σ = 669978. Its totient is φ = 164472.

The previous prime is 383839. The next prime is 383869. The reversal of 383866 is 668383.

It can be written as a sum of positive squares in only one way, i.e., 275625 + 108241 = 525^2 + 329^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (383869) 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, 1861 + ... + 2056.

2³⁸³⁸⁶⁶ is an apocalyptic number.

383866 is a deficient number, since it is larger than the sum of its proper divisors (286112).

383866 is a wasteful number, since it uses less digits than its factorization.

383866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933 (or 3926 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 383866 is about 619.5692051740. The cubic root of 383866 is about 72.6763680713.

The spelling of 383866 in words is "three hundred eighty-three thousand, eight hundred sixty-six".