3878205 has 16 divisors (see below), whose sum is σ = 6338304. Its totient is φ = 2024000.

The previous prime is 3878183. The next prime is 3878207. The reversal of 3878205 is 5028783.

It is not a de Polignac number, because 3878205 - 2¹² = 3874109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2046 + ... + 3455.

It is an arithmetic number, because the mean of its divisors is an integer number (396144).

Almost surely, 2^3878205 is an apocalyptic number.

It is an amenable number.

3878205 is a deficient number, since it is larger than the sum of its proper divisors (2460099).

3878205 is a wasteful number, since it uses less digits than its factorization.

3878205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 3878205 is about 1969.3158710578. The cubic root of 3878205 is about 157.1123244497.

The spelling of 3878205 in words is "three million, eight hundred seventy-eight thousand, two hundred five".