28238641244 has 24 divisors (see below), whose sum is σ = 56747510400. Its totient is φ = 12160180080.

The previous prime is 28238641237. The next prime is 28238641267. The reversal of 28238641244 is 44214683282.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 28238641195 and 28238641204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16888304 + ... + 16889975.

It is an arithmetic number, because the mean of its divisors is an integer number (2364479600).

Almost surely, 2^28238641244 is an apocalyptic number.

It is an amenable number.

28238641244 is an abundant number, since it is smaller than the sum of its proper divisors (28508869156).

28238641244 is a wasteful number, since it uses less digits than its factorization.

28238641244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33778313 (or 33778311 counting only the distinct ones).

The product of its digits is 589824, while the sum is 44.

The spelling of 28238641244 in words is "twenty-eight billion, two hundred thirty-eight million, six hundred forty-one thousand, two hundred forty-four".