3915855 has 24 divisors (see below), whose sum is σ = 6840288. Its totient is φ = 2072256.

The previous prime is 3915853. The next prime is 3915887. The reversal of 3915855 is 5585193.

It is a happy number.

It is not a de Polignac number, because 3915855 - 2¹ = 3915853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3915853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7534 + ... + 8036.

It is an arithmetic number, because the mean of its divisors is an integer number (285012).

Almost surely, 2^3915855 is an apocalyptic number.

3915855 is a deficient number, since it is larger than the sum of its proper divisors (2924433).

3915855 is a wasteful number, since it uses less digits than its factorization.

3915855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 684 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 3915855 is about 1978.8519398884. The cubic root of 3915855 is about 157.6191086925.

The spelling of 3915855 in words is "three million, nine hundred fifteen thousand, eight hundred fifty-five".