28104100 has 36 divisors (see below), whose sum is σ = 61218304. Its totient is φ = 11198880.

The previous prime is 28104047. The next prime is 28104107. The reversal of 28104100 is 140182.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28104107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45997 + ... + 46603.

Almost surely, 2^28104100 is an apocalyptic number.

28104100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28104100 is an abundant number, since it is smaller than the sum of its proper divisors (33114204).

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

28104100 is a wasteful number, since it uses less digits than its factorization.

28104100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 28104100 is about 5301.3300217964. The cubic root of 28104100 is about 304.0347519136.

Adding to 28104100 its reverse (140182), we get a palindrome (28244282).

The spelling of 28104100 in words is "twenty-eight million, one hundred four thousand, one hundred".