4013888 has 28 divisors (see below), whose sum is σ = 8107680. Its totient is φ = 1971072.

The previous prime is 4013881. The next prime is 4013897. The reversal of 4013888 is 8883104.

It is a super-2 number, since 2×4013888² = 32222593753088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4013881) 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, 3245 + ... + 4307.

It is an arithmetic number, because the mean of its divisors is an integer number (289560).

Almost surely, 2^4013888 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 4013888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4053840).

4013888 is an abundant number, since it is smaller than the sum of its proper divisors (4093792).

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

4013888 is a wasteful number, since it uses less digits than its factorization.

4013888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 4013888 is about 2003.4689915245. The cubic root of 4013888 is about 158.9236082013.

The spelling of 4013888 in words is "four million, thirteen thousand, eight hundred eighty-eight".