28207215050 has 36 divisors (see below), whose sum is σ = 61031208150. Its totient is φ = 9671044320.

The previous prime is 28207215011. The next prime is 28207215059. The reversal of 28207215050 is 5051270282.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 16950217249 + 11256997801 = 130193^2 + 106099^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28207214998 and 28207215016.

It is not an unprimeable number, because it can be changed into a prime (28207215059) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5754125 + ... + 5759024.

Almost surely, 2^28207215050 is an apocalyptic number.

28207215050 is an abundant number, since it is smaller than the sum of its proper divisors (32823993100).

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

28207215050 is a wasteful number, since it uses less digits than its factorization.

28207215050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11513175 (or 11513163 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The spelling of 28207215050 in words is "twenty-eight billion, two hundred seven million, two hundred fifteen thousand, fifty".