3859855 has 4 divisors (see below), whose sum is σ = 4631832. Its totient is φ = 3087880.

The previous prime is 3859847. The next prime is 3859879. The reversal of 3859855 is 5589583.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3859855 - 2³ = 3859847 is a prime.

It is a Duffinian number.

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, 385981 + ... + 385990.

It is an arithmetic number, because the mean of its divisors is an integer number (1157958).

Almost surely, 2^3859855 is an apocalyptic number.

3859855 is a deficient number, since it is larger than the sum of its proper divisors (771977).

3859855 is an equidigital number, since it uses as much as digits as its factorization.

3859855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771976.

The product of its digits is 216000, while the sum is 43.

The square root of 3859855 is about 1964.6513685639. The cubic root of 3859855 is about 156.8641365895.

The spelling of 3859855 in words is "three million, eight hundred fifty-nine thousand, eight hundred fifty-five".