28679422500 has 135 divisors (see below), whose sum is σ = 90670320741. Its totient is φ = 7641072000.

The previous prime is 28679422493. The next prime is 28679422531. The reversal of 28679422500 is 522497682.

The square root of 28679422500 is 169350.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 28675358244 + 4064256 = 169338^2 + 2016^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 25401936 + ... + 25403064.

Almost surely, 2^28679422500 is an apocalyptic number.

28679422500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

28679422500 is the 169350-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28679422500

28679422500 is an abundant number, since it is smaller than the sum of its proper divisors (61990898241).

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

28679422500 is an equidigital number, since it uses as much as digits as its factorization.

28679422500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 28679422500 in words is "twenty-eight billion, six hundred seventy-nine million, four hundred twenty-two thousand, five hundred".