28662121300 has 72 divisors (see below), whose sum is σ = 65583302400. Its totient is φ = 10842693120.

The previous prime is 28662121291. The next prime is 28662121307. The reversal of 28662121300 is 312126682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28662121307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1113981 + ... + 1139419.

It is an arithmetic number, because the mean of its divisors is an integer number (910879200).

Almost surely, 2^28662121300 is an apocalyptic number.

28662121300 is a gapful number since it is divisible by the number (20) 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 28662121300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32791651200).

28662121300 is an abundant number, since it is smaller than the sum of its proper divisors (36921181100).

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

28662121300 is a wasteful number, since it uses less digits than its factorization.

28662121300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26065 (or 26058 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 28662121300 its reverse (312126682), we get a palindrome (28974247982).

The spelling of 28662121300 in words is "twenty-eight billion, six hundred sixty-two million, one hundred twenty-one thousand, three hundred".