3640043520 has 288 divisors, whose sum is σ = 12755957760. Its totient is φ = 959938560.

The previous prime is 3640043513. The next prime is 3640043531. The reversal of 3640043520 is 253400463.

It is a tau number, because it is divible by the number of its divisors (288).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11704165 + ... + 11704475.

It is an arithmetic number, because the mean of its divisors is an integer number (44291520).

Almost surely, 2^3640043520 is an apocalyptic number.

3640043520 is a gapful number since it is divisible by the number (30) 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 3640043520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6377978880).

3640043520 is an abundant number, since it is smaller than the sum of its proper divisors (9115914240).

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

3640043520 is a wasteful number, since it uses less digits than its factorization.

3640043520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 3640043520 is about 60332.7731834034. The cubic root of 3640043520 is about 1538.2804667303.

Adding to 3640043520 its reverse (253400463), we get a palindrome (3893443983).

The spelling of 3640043520 in words is "three billion, six hundred forty million, forty-three thousand, five hundred twenty".