4528509640 has 128 divisors (see below), whose sum is σ = 11008483200. Its totient is φ = 1670492160.

The previous prime is 4528509637. The next prime is 4528509677. The reversal of 4528509640 is 469058254.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7930555 + ... + 7931125.

It is an arithmetic number, because the mean of its divisors is an integer number (86003775).

Almost surely, 2^4528509640 is an apocalyptic number.

4528509640 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 4528509640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5504241600).

4528509640 is an abundant number, since it is smaller than the sum of its proper divisors (6479973560).

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

4528509640 is a wasteful number, since it uses less digits than its factorization.

4528509640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 4528509640 is about 67294.2021276722. The cubic root of 4528509640 is about 1654.4428338390.

The spelling of 4528509640 in words is "four billion, five hundred twenty-eight million, five hundred nine thousand, six hundred forty".