3858660 has 144 divisors (see below), whose sum is σ = 13484016. Its totient is φ = 884736.

The previous prime is 3858629. The next prime is 3858667. The reversal of 3858660 is 668583.

3858660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 79524 + 3779136 = 282^2 + 1944^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3858667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39732 + ... + 39828.

It is an arithmetic number, because the mean of its divisors is an integer number (93639).

Almost surely, 2^3858660 is an apocalyptic number.

3858660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3858660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6742008).

3858660 is an abundant number, since it is smaller than the sum of its proper divisors (9625356).

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

3858660 is a wasteful number, since it uses less digits than its factorization.

3858660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 3858660 is about 1964.3472198163. The cubic root of 3858660 is about 156.8479466902.

It can be divided in two parts, 385 and 8660, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 3858660 in words is "three million, eight hundred fifty-eight thousand, six hundred sixty".