3868840 has 24 divisors (see below), whose sum is σ = 8732970. Its totient is φ = 1542560.

The previous prime is 3868817. The next prime is 3868847. The reversal of 3868840 is 488683.

It can be written as a sum of positive squares in only one way, i.e., 3481956 + 386884 = 1866^2 + 622^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3868840.

It is not an unprimeable number, because it can be changed into a prime (3868847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12285 + ... + 12595.

Almost surely, 2^3868840 is an apocalyptic number.

It is an amenable number.

3868840 is an abundant number, since it is smaller than the sum of its proper divisors (4864130).

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

3868840 is an equidigital number, since it uses as much as digits as its factorization.

3868840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 3868840 is about 1966.9367046247. The cubic root of 3868840 is about 156.9857587796.

The spelling of 3868840 in words is "three million, eight hundred sixty-eight thousand, eight hundred forty".