28257316211238 has 64 divisors (see below), whose sum is σ = 60128248458240. Its totient is φ = 8833145729408.

The previous prime is 28257316211237. The next prime is 28257316211287. The reversal of 28257316211238 is 83211261375282.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28257316211237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8635183 + ... + 11449061.

It is an arithmetic number, because the mean of its divisors is an integer number (939503882160).

Almost surely, 2^{28257316211238} is an apocalyptic number.

28257316211238 is an abundant number, since it is smaller than the sum of its proper divisors (31870932247002).

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

28257316211238 is a wasteful number, since it uses less digits than its factorization.

28257316211238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815333.

The product of its digits is 1935360, while the sum is 51.

The spelling of 28257316211238 in words is "twenty-eight trillion, two hundred fifty-seven billion, three hundred sixteen million, two hundred eleven thousand, two hundred thirty-eight".