28751100 has 72 divisors (see below), whose sum is σ = 95077248. Its totient is φ = 6571200.

The previous prime is 28751087. The next prime is 28751119. The reversal of 28751100 is 115782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4746 + ... + 8945.

Almost surely, 2^28751100 is an apocalyptic number.

28751100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28751100 is an abundant number, since it is smaller than the sum of its proper divisors (66326148).

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

28751100 is a wasteful number, since it uses less digits than its factorization.

28751100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13715 (or 13708 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 28751100 is about 5362.0052219296. The cubic root of 28751100 is about 306.3501907367.

Adding to 28751100 its reverse (115782), we get a palindrome (28866882).

The spelling of 28751100 in words is "twenty-eight million, seven hundred fifty-one thousand, one hundred".