28928539830 has 32 divisors (see below), whose sum is σ = 70102566144. Its totient is φ = 7639380576.

The previous prime is 28928539771. The next prime is 28928539837. The reversal of 28928539830 is 3893582982.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928539837) 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, 4677904 + ... + 4684083.

It is an arithmetic number, because the mean of its divisors is an integer number (2190705192).

Almost surely, 2^28928539830 is an apocalyptic number.

28928539830 is an abundant number, since it is smaller than the sum of its proper divisors (41174026314).

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

28928539830 is a wasteful number, since it uses less digits than its factorization.

28928539830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9362100.

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 28928539830 in words is "twenty-eight billion, nine hundred twenty-eight million, five hundred thirty-nine thousand, eight hundred thirty".