383855 has 4 divisors (see below), whose sum is σ = 460632. Its totient is φ = 307080.

The previous prime is 383839. The next prime is 383869. The reversal of 383855 is 558383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 558383 = 7 ⋅79769.

It is not a de Polignac number, because 383855 - 2⁴ = 383839 is a prime.

It is a super-2 number, since 2×383855² = 294689322050, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38381 + ... + 38390.

It is an arithmetic number, because the mean of its divisors is an integer number (115158).

2³⁸³⁸⁵⁵ is an apocalyptic number.

383855 is a deficient number, since it is larger than the sum of its proper divisors (76777).

383855 is an equidigital number, since it uses as much as digits as its factorization.

383855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76776.

The product of its digits is 14400, while the sum is 32.

The square root of 383855 is about 619.5603279746. The cubic root of 383855 is about 72.6756738641.

The spelling of 383855 in words is "three hundred eighty-three thousand, eight hundred fifty-five".