3888440 has 32 divisors (see below), whose sum is σ = 8966160. Its totient is φ = 1516800.

The previous prime is 3888431. The next prime is 3888463. The reversal of 3888440 is 448883.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3888440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455 + ... + 2825.

Almost surely, 2^3888440 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 3888440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4483080).

3888440 is an abundant number, since it is smaller than the sum of its proper divisors (5077720).

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

3888440 is a wasteful number, since it uses less digits than its factorization.

3888440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423 (or 2419 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 3888440 is about 1971.9127769757. The cubic root of 3888440 is about 157.2504151480.

The spelling of 3888440 in words is "three million, eight hundred eighty-eight thousand, four hundred forty".