3886720 has 32 divisors (see below), whose sum is σ = 9293220. Its totient is φ = 1554432.

The previous prime is 3886717. The next prime is 3886723. The reversal of 3886720 is 276883.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3886717) and next prime (3886723).

It can be written as a sum of positive squares in 2 ways, for example, as 3779136 + 107584 = 1944^2 + 328^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (3886723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2397 + ... + 3676.

Almost surely, 2^3886720 is an apocalyptic number.

It is an amenable number.

3886720 is an abundant number, since it is smaller than the sum of its proper divisors (5406500).

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

3886720 is an equidigital number, since it uses as much as digits as its factorization.

3886720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6092 (or 6080 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 3886720 is about 1971.4766039697. The cubic root of 3886720 is about 157.2272258481.

The spelling of 3886720 in words is "three million, eight hundred eighty-six thousand, seven hundred twenty".