28569800 has 48 divisors (see below), whose sum is σ = 75917760. Its totient is φ = 9794880.

The previous prime is 28569799. The next prime is 28569803. The reversal of 28569800 is 896582.

It is not an unprimeable number, because it can be changed into a prime (28569803) 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, 8804 + ... + 11603.

It is an arithmetic number, because the mean of its divisors is an integer number (1581620).

Almost surely, 2^28569800 is an apocalyptic number.

28569800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28569800 is an abundant number, since it is smaller than the sum of its proper divisors (47347960).

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

28569800 is a wasteful number, since it uses less digits than its factorization.

28569800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20430 (or 20421 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 28569800 is about 5345.0724971697. The cubic root of 28569800 is about 305.7049001190.

It can be divided in two parts, 2 and 8569800, that multiplied together give a square (17139600 = 4140²).

The spelling of 28569800 in words is "twenty-eight million, five hundred sixty-nine thousand, eight hundred".