4040388 has 96 divisors (see below), whose sum is σ = 12096000. Its totient is φ = 1153440.

The previous prime is 4040383. The next prime is 4040389. The reversal of 4040388 is 8830404.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (4040383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22483 + ... + 22661.

It is an arithmetic number, because the mean of its divisors is an integer number (126000).

Almost surely, 2^4040388 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 4040388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6048000).

4040388 is an abundant number, since it is smaller than the sum of its proper divisors (8055612).

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

4040388 is a wasteful number, since it uses less digits than its factorization.

4040388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 4040388 is about 2010.0716405143. The cubic root of 4040388 is about 159.2725833346.

The spelling of 4040388 in words is "four million, forty thousand, three hundred eighty-eight".