28540607328 has 72 divisors (see below), whose sum is σ = 81464292000. Its totient is φ = 9478143744.

The previous prime is 28540607299. The next prime is 28540607339. The reversal of 28540607328 is 82370604582.

28540607328 is a `hidden beast` number, since 2 + 8 + 5 + 4 + 0 + 607 + 32 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106728 + ... + 261671.

It is an arithmetic number, because the mean of its divisors is an integer number (1131448500).

Almost surely, 2^28540607328 is an apocalyptic number.

It is an amenable number.

28540607328 is an abundant number, since it is smaller than the sum of its proper divisors (52923684672).

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

28540607328 is a wasteful number, since it uses less digits than its factorization.

28540607328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368684 (or 368673 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 28540607328 in words is "twenty-eight billion, five hundred forty million, six hundred seven thousand, three hundred twenty-eight".