28010220238 has 128 divisors (see below), whose sum is σ = 60073767936. Its totient is φ = 9426585600.

The previous prime is 28010220233. The next prime is 28010220247. The reversal of 28010220238 is 83202201082.

It is a super-3 number, since 3×28010220238³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28010220233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6157881 + ... + 6162427.

It is an arithmetic number, because the mean of its divisors is an integer number (469326312).

Almost surely, 2^28010220238 is an apocalyptic number.

28010220238 is an abundant number, since it is smaller than the sum of its proper divisors (32063547698).

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

28010220238 is a wasteful number, since it uses less digits than its factorization.

28010220238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778.

The product of its (nonzero) digits is 3072, while the sum is 28.

The spelling of 28010220238 in words is "twenty-eight billion, ten million, two hundred twenty thousand, two hundred thirty-eight".