28869100 has 72 divisors (see below), whose sum is σ = 68901840. Its totient is φ = 10433280.

The previous prime is 28869089. The next prime is 28869101. The reversal of 28869100 is 196882.

It is not an unprimeable number, because it can be changed into a prime (28869101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68691 + ... + 69109.

It is an arithmetic number, because the mean of its divisors is an integer number (956970).

Almost surely, 2^28869100 is an apocalyptic number.

28869100 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 28869100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34450920).

28869100 is an abundant number, since it is smaller than the sum of its proper divisors (40032740).

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

28869100 is a wasteful number, since it uses less digits than its factorization.

28869100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 28869100 is about 5372.9973013207. The cubic root of 28869100 is about 306.7687252204.

The spelling of 28869100 in words is "twenty-eight million, eight hundred sixty-nine thousand, one hundred".