28523891058 has 64 divisors (see below), whose sum is σ = 63592660992. Its totient is φ = 8470059840.

The previous prime is 28523891057. The next prime is 28523891069. The reversal of 28523891058 is 85019832582.

It is a super-2 number, since 2×28523891058² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28523891058.

It is not an unprimeable number, because it can be changed into a prime (28523891051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 871335 + ... + 903477.

It is an arithmetic number, because the mean of its divisors is an integer number (993635328).

Almost surely, 2^28523891058 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28523891058, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31796330496).

28523891058 is an abundant number, since it is smaller than the sum of its proper divisors (35068769934).

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

28523891058 is a wasteful number, since it uses less digits than its factorization.

28523891058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32559.

The product of its (nonzero) digits is 1382400, while the sum is 51.

The spelling of 28523891058 in words is "twenty-eight billion, five hundred twenty-three million, eight hundred ninety-one thousand, fifty-eight".