3866140 has 48 divisors (see below), whose sum is σ = 8763552. Its totient is φ = 1427456.

The previous prime is 3866117. The next prime is 3866141. The reversal of 3866140 is 416683.

It is a junction number, because it is equal to n+sod(n) for n = 3866099 and 3866108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866141) 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, 28152 + ... + 28288.

It is an arithmetic number, because the mean of its divisors is an integer number (182574).

Almost surely, 2^3866140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3866140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4381776).

3866140 is an abundant number, since it is smaller than the sum of its proper divisors (4897412).

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

3866140 is a wasteful number, since it uses less digits than its factorization.

3866140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 3866140 is about 1966.2502383980. The cubic root of 3866140 is about 156.9492310186.

The spelling of 3866140 in words is "three million, eight hundred sixty-six thousand, one hundred forty".