28202100 has 36 divisors (see below), whose sum is σ = 81598944. Its totient is φ = 7520480.

The previous prime is 28202093. The next prime is 28202101. The reversal of 28202100 is 120282.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 28202100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28202101) 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, 46704 + ... + 47303.

Almost surely, 2^28202100 is an apocalyptic number.

28202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28202100 is an abundant number, since it is smaller than the sum of its proper divisors (53396844).

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

28202100 is a wasteful number, since it uses less digits than its factorization.

28202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94024 (or 94017 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 28202100 is about 5310.5649416988. The cubic root of 28202100 is about 304.3877352870.

Adding to 28202100 its reverse (120282), we get a palindrome (28322382).

The spelling of 28202100 in words is "twenty-eight million, two hundred two thousand, one hundred".