383866856 has 8 divisors (see below), whose sum is σ = 719750370. Its totient is φ = 191933424.

The previous prime is 383866829. The next prime is 383866859. The reversal of 383866856 is 658668383.

It can be written as a sum of positive squares in only one way, i.e., 221712100 + 162154756 = 14890^2 + 12734^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 383866798 and 383866807.

It is not an unprimeable number, because it can be changed into a prime (383866859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23991671 + ... + 23991686.

Almost surely, 2^383866856 is an apocalyptic number.

It is an amenable number.

383866856 is a deficient number, since it is larger than the sum of its proper divisors (335883514).

383866856 is a wasteful number, since it uses less digits than its factorization.

383866856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47983363 (or 47983359 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 53.

The square root of 383866856 is about 19592.5204095849. The cubic root of 383866856 is about 726.7642209273.

The spelling of 383866856 in words is "three hundred eighty-three million, eight hundred sixty-six thousand, eight hundred fifty-six".