28825100 has 36 divisors (see below), whose sum is σ = 63891744. Its totient is φ = 11282880.

The previous prime is 28825039. The next prime is 28825117. The reversal of 28825100 is 152882.

It is a self number, because there is not a number n which added to its sum of digits gives 28825100.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1634 + ... + 7766.

Almost surely, 2^28825100 is an apocalyptic number.

28825100 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 28825100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31945872).

28825100 is an abundant number, since it is smaller than the sum of its proper divisors (35066644).

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

28825100 is a wasteful number, since it uses less digits than its factorization.

28825100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6194 (or 6187 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 28825100 is about 5368.9011911191. The cubic root of 28825100 is about 306.6127950949.

Adding to 28825100 its reverse (152882), we get a palindrome (28977982).

The spelling of 28825100 in words is "twenty-eight million, eight hundred twenty-five thousand, one hundred".