4640043520 has 160 divisors (see below), whose sum is σ = 12892353408. Its totient is φ = 1568636928.

The previous prime is 4640043511. The next prime is 4640043521. The reversal of 4640043520 is 253400464.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (4640043521) 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, 1306387 + ... + 1309933.

Almost surely, 2^4640043520 is an apocalyptic number.

4640043520 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 4640043520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6446176704).

4640043520 is an abundant number, since it is smaller than the sum of its proper divisors (8252309888).

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

4640043520 is an equidigital number, since it uses as much as digits as its factorization.

4640043520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650 (or 3634 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 4640043520 is about 68117.8649107560. The cubic root of 4640043520 is about 1667.9153976800.

Adding to 4640043520 its reverse (253400464), we get a palindrome (4893443984).

The spelling of 4640043520 in words is "four billion, six hundred forty million, forty-three thousand, five hundred twenty".