4000521860 has 48 divisors (see below), whose sum is σ = 8486478000. Its totient is φ = 1584021504.

The previous prime is 4000521857. The next prime is 4000521869. The reversal of 4000521860 is 681250004.

It can be written as a sum of positive squares in 8 ways, for example, as 527069764 + 3473452096 = 22958^2 + 58936^2 .

It is not an unprimeable number, because it can be changed into a prime (4000521869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930596 + ... + 934884.

It is an arithmetic number, because the mean of its divisors is an integer number (176801625).

Almost surely, 2^4000521860 is an apocalyptic number.

It is an amenable number.

4000521860 is an abundant number, since it is smaller than the sum of its proper divisors (4485956140).

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

4000521860 is a wasteful number, since it uses less digits than its factorization.

4000521860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4760 (or 4758 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 4000521860 is about 63249.6787343620. The cubic root of 4000521860 is about 1587.4700823924.

Adding to 4000521860 its reverse (681250004), we get a palindrome (4681771864).

The spelling of 4000521860 in words is "four billion, five hundred twenty-one thousand, eight hundred sixty".