384856 has 16 divisors (see below), whose sum is σ = 732600. Its totient is φ = 189504.

The previous prime is 384851. The next prime is 384889. The reversal of 384856 is 658483.

384856 = T₆₄ + T₆₅ + ... + T₁₃₆.

It is a super-2 number, since 2×384856² = 296228281472, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384851) by changing a digit.

384856 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, 255 + ... + 913.

2³⁸⁴⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

384856 is a deficient number, since it is larger than the sum of its proper divisors (347744).

384856 is a wasteful number, since it uses less digits than its factorization.

384856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 734 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 384856 is about 620.3676329403. The cubic root of 384856 is about 72.7387924934.

It can be divided in two parts, 38 and 4856, that multiplied together give a triangular number (184528 = T₆₀₇).

The spelling of 384856 in words is "three hundred eighty-four thousand, eight hundred fifty-six".