3868140 has 48 divisors (see below), whose sum is σ = 11305728. Its totient is φ = 986304.

The previous prime is 3868133. The next prime is 3868141. The reversal of 3868140 is 418683.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3868098 and 3868107.

It is not an unprimeable number, because it can be changed into a prime (3868141) 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, 22 + ... + 2781.

It is an arithmetic number, because the mean of its divisors is an integer number (235536).

Almost surely, 2^3868140 is an apocalyptic number.

3868140 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 3868140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5652864).

3868140 is an abundant number, since it is smaller than the sum of its proper divisors (7437588).

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

3868140 is a wasteful number, since it uses less digits than its factorization.

3868140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838 (or 2836 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 3868140 is about 1966.7587549062. The cubic root of 3868140 is about 156.9762902517.

The spelling of 3868140 in words is "three million, eight hundred sixty-eight thousand, one hundred forty".