3886440 has 64 divisors (see below), whose sum is σ = 11793600. Its totient is φ = 1024512.

The previous prime is 3886433. The next prime is 3886453. The reversal of 3886440 is 446883.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16564 + ... + 16796.

It is an arithmetic number, because the mean of its divisors is an integer number (184275).

Almost surely, 2^3886440 is an apocalyptic number.

3886440 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 3886440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5896800).

3886440 is an abundant number, since it is smaller than the sum of its proper divisors (7907160).

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

3886440 is a wasteful number, since it uses less digits than its factorization.

3886440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 3886440 is about 1971.4055899282. The cubic root of 3886440 is about 157.2234501983.

The spelling of 3886440 in words is "three million, eight hundred eighty-six thousand, four hundred forty".