4529728640 has 64 divisors (see below), whose sum is σ = 10840203000. Its totient is φ = 1809997824.

The previous prime is 4529728633. The next prime is 4529728657. The reversal of 4529728640 is 468279254.

It can be written as a sum of positive squares in 4 ways, for example, as 2189491264 + 2340237376 = 46792^2 + 48376^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 719426 + ... + 725694.

Almost surely, 2^4529728640 is an apocalyptic number.

4529728640 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 4529728640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5420101500).

4529728640 is an abundant number, since it is smaller than the sum of its proper divisors (6310474360).

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

4529728640 is a wasteful number, since it uses less digits than its factorization.

4529728640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7417 (or 7405 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 4529728640 is about 67303.2587621134. The cubic root of 4529728640 is about 1654.5912700827.

It can be divided in two parts, 45297 and 28640, that added together give a palindrome (73937).

The spelling of 4529728640 in words is "four billion, five hundred twenty-nine million, seven hundred twenty-eight thousand, six hundred forty".