4040040 has 64 divisors (see below), whose sum is σ = 12260160. Its totient is φ = 1064960.

The previous prime is 4040021. The next prime is 4040041. The reversal of 4040040 is 400404.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 4039998 and 4040025.

It is not an unprimeable number, because it can be changed into a prime (4040041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15592 + ... + 15848.

It is an arithmetic number, because the mean of its divisors is an integer number (191565).

Almost surely, 2^4040040 is an apocalyptic number.

4040040 is a gapful number since it is divisible by the number (40) 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 4040040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6130080).

4040040 is an abundant number, since it is smaller than the sum of its proper divisors (8220120).

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

4040040 is a wasteful number, since it uses less digits than its factorization.

4040040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 4040040 is about 2009.9850745715. The cubic root of 4040040 is about 159.2680104693.

Adding to 4040040 its reverse (400404), we get a palindrome (4440444).

The spelling of 4040040 in words is "four million, forty thousand, forty", and thus it is an eban number.