28082100 has 36 divisors (see below), whose sum is σ = 81251744. Its totient is φ = 7488480.

The previous prime is 28082083. The next prime is 28082101. The reversal of 28082100 is 128082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28082101) 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, 46504 + ... + 47103.

Almost surely, 2^28082100 is an apocalyptic number.

28082100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28082100 is an abundant number, since it is smaller than the sum of its proper divisors (53169644).

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

28082100 is a wasteful number, since it uses less digits than its factorization.

28082100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93624 (or 93617 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 28082100 is about 5299.2546645731. The cubic root of 28082100 is about 303.9553980040.

It can be divided in two parts, 28082 and 100, that added together give a palindrome (28182).

The spelling of 28082100 in words is "twenty-eight million, eighty-two thousand, one hundred".