28458484854820 has 48 divisors (see below), whose sum is σ = 60006643830000. Its totient is φ = 11337044705280.

The previous prime is 28458484854809. The next prime is 28458484854827. The reversal of 28458484854820 is 2845848485482.

It can be written as a sum of positive squares in 8 ways, for example, as 26618575104 + 28431866279716 = 163152^2 + 5332154^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28458484854820.

It is not an unprimeable number, because it can be changed into a prime (28458484854827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1929256 + ... + 7787104.

It is an arithmetic number, because the mean of its divisors is an integer number (1250138413125).

Almost surely, 2^{28458484854820} is an apocalyptic number.

28458484854820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28458484854820 is an abundant number, since it is smaller than the sum of its proper divisors (31548158975180).

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

28458484854820 is a wasteful number, since it uses less digits than its factorization.

28458484854820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5858848 (or 5858846 counting only the distinct ones).

The product of its (nonzero) digits is 838860800, while the sum is 70.

The spelling of 28458484854820 in words is "twenty-eight trillion, four hundred fifty-eight billion, four hundred eighty-four million, eight hundred fifty-four thousand, eight hundred twenty".