28366900 has 18 divisors (see below), whose sum is σ = 61556390. Its totient is φ = 11346720.

The previous prime is 28366883. The next prime is 28366907. The reversal of 28366900 is 966382.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 425104 + 27941796 = 652^2 + 5286^2 .

It is a super-2 number, since 2×28366900² = 1609362031220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28366907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141735 + ... + 141934.

Almost surely, 2^28366900 is an apocalyptic number.

28366900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28366900 is an abundant number, since it is smaller than the sum of its proper divisors (33189490).

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

28366900 is a wasteful number, since it uses less digits than its factorization.

28366900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283683 (or 283676 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 28366900 is about 5326.0585802261. The cubic root of 28366900 is about 304.9794844214.

The spelling of 28366900 in words is "twenty-eight million, three hundred sixty-six thousand, nine hundred".