4040520 has 64 divisors (see below), whose sum is σ = 13227840. Its totient is φ = 979200.

The previous prime is 4040513. The next prime is 4040527. The reversal of 4040520 is 250404.

It is an interprime number because it is at equal distance from previous prime (4040513) and next prime (4040527).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 4040520.

It is not an unprimeable number, because it can be changed into a prime (4040527) 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, 211 + ... + 2850.

It is an arithmetic number, because the mean of its divisors is an integer number (206685).

Almost surely, 2^4040520 is an apocalyptic number.

4040520 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 4040520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6613920).

4040520 is an abundant number, since it is smaller than the sum of its proper divisors (9187320).

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

4040520 is a wasteful number, since it uses less digits than its factorization.

4040520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086 (or 3082 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 4040520 is about 2010.1044748968. The cubic root of 4040520 is about 159.2743178011.

Adding to 4040520 its reverse (250404), we get a palindrome (4290924).

It can be divided in two parts, 4040 and 520, that added together give a triangular number (4560 = T₉₅).

The spelling of 4040520 in words is "four million, forty thousand, five hundred twenty".