3955686 has 32 divisors (see below), whose sum is σ = 9519360. Its totient is φ = 1070496.

The previous prime is 3955673. The next prime is 3955691. The reversal of 3955686 is 6865593.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a d-powerful number, because it can be written as 3⁵ + 9³ + 5⁹ + 5⁹ + 6⁴ + 8³ + 6⁶ .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1681 + ... + 3276.

It is an arithmetic number, because the mean of its divisors is an integer number (297480).

Almost surely, 2^3955686 is an apocalyptic number.

3955686 is an abundant number, since it is smaller than the sum of its proper divisors (5563674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3955686 is a wasteful number, since it uses less digits than its factorization.

3955686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4988.

The product of its digits is 194400, while the sum is 42.

The square root of 3955686 is about 1988.8906455610. The cubic root of 3955686 is about 158.1517262807.

The spelling of 3955686 in words is "three million, nine hundred fifty-five thousand, six hundred eighty-six".