28751200 has 72 divisors (see below), whose sum is σ = 71198568. Its totient is φ = 11335680.

The previous prime is 28751197. The next prime is 28751201. The reversal of 28751200 is 215782.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28751201) 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, 66184 + ... + 66616.

It is an arithmetic number, because the mean of its divisors is an integer number (988869).

Almost surely, 2^28751200 is an apocalyptic number.

28751200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28751200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35599284).

28751200 is an abundant number, since it is smaller than the sum of its proper divisors (42447368).

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

28751200 is a wasteful number, since it uses less digits than its factorization.

28751200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 28751200 is about 5362.0145467912. The cubic root of 28751200 is about 306.3505459113.

Adding to 28751200 its reverse (215782), we get a palindrome (28966982).

The spelling of 28751200 in words is "twenty-eight million, seven hundred fifty-one thousand, two hundred".