28851100 has 36 divisors (see below), whose sum is σ = 62902224. Its totient is φ = 11486080.

The previous prime is 28851089. The next prime is 28851103. The reversal of 28851100 is 115882.

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 (28851103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25752 + ... + 26848.

It is an arithmetic number, because the mean of its divisors is an integer number (1747284).

Almost surely, 2^28851100 is an apocalyptic number.

28851100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28851100 is an abundant number, since it is smaller than the sum of its proper divisors (34051124).

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

28851100 is a wasteful number, since it uses less digits than its factorization.

28851100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374 (or 1367 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 28851100 is about 5371.3219974230. The cubic root of 28851100 is about 306.7049547867.

Adding to 28851100 its reverse (115882), we get a palindrome (28966982).

The spelling of 28851100 in words is "twenty-eight million, eight hundred fifty-one thousand, one hundred".