28272051100 has 36 divisors (see below), whose sum is σ = 61357666608. Its totient is φ = 11307472000.

The previous prime is 28272050959. The next prime is 28272051103. The reversal of 28272051100 is 115027282.

It is a super-2 number, since 2×28272051100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28272051103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1558080 + ... + 1576120.

It is an arithmetic number, because the mean of its divisors is an integer number (1704379628).

Almost surely, 2^28272051100 is an apocalyptic number.

28272051100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28272051100 is an abundant number, since it is smaller than the sum of its proper divisors (33085615508).

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

28272051100 is a wasteful number, since it uses less digits than its factorization.

28272051100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33726 (or 33719 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 28272051100 its reverse (115027282), we get a palindrome (28387078382).

The spelling of 28272051100 in words is "twenty-eight billion, two hundred seventy-two million, fifty-one thousand, one hundred".