4140040 has 64 divisors (see below), whose sum is σ = 9979200. Its totient is φ = 1542912.

The previous prime is 4140029. The next prime is 4140047. The reversal of 4140040 is 400414.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 4140040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4140047) 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, 49839 + ... + 49921.

It is an arithmetic number, because the mean of its divisors is an integer number (155925).

Almost surely, 2^4140040 is an apocalyptic number.

4140040 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 4140040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4989600).

4140040 is an abundant number, since it is smaller than the sum of its proper divisors (5839160).

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

4140040 is a wasteful number, since it uses less digits than its factorization.

4140040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4140040 is about 2034.7088243776. The cubic root of 4140040 is about 160.5713944979.

Adding to 4140040 its reverse (400414), we get a palindrome (4540454).

The spelling of 4140040 in words is "four million, one hundred forty thousand, forty".