4000520 has 32 divisors (see below), whose sum is σ = 9097920. Its totient is φ = 1583040.

The previous prime is 4000511. The next prime is 4000523. The reversal of 4000520 is 250004.

It is not an unprimeable number, because it can be changed into a prime (4000523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3635 + ... + 4605.

It is an arithmetic number, because the mean of its divisors is an integer number (284310).

Almost surely, 2^4000520 is an apocalyptic number.

4000520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4000520 is an abundant number, since it is smaller than the sum of its proper divisors (5097400).

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

4000520 is a wasteful number, since it uses less digits than its factorization.

4000520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 4000520 is about 2000.1299957753. The cubic root of 4000520 is about 158.7469836367.

Adding to 4000520 its reverse (250004), we get a palindrome (4250524).

The spelling of 4000520 in words is "four million, five hundred twenty", and thus it is an aban number.