28127900 has 18 divisors (see below), whose sum is σ = 61037760. Its totient is φ = 11251120.

The previous prime is 28127899. The next prime is 28127909. The reversal of 28127900 is 972182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28127909) 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 5 ways as a sum of consecutive naturals, for example, 140540 + ... + 140739.

Almost surely, 2^28127900 is an apocalyptic number.

28127900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28127900 is an abundant number, since it is smaller than the sum of its proper divisors (32909860).

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

28127900 is a wasteful number, since it uses less digits than its factorization.

28127900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281293 (or 281286 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 28127900 is about 5303.5742664735. The cubic root of 28127900 is about 304.1205517962.

The spelling of 28127900 in words is "twenty-eight million, one hundred twenty-seven thousand, nine hundred".