28885000 has 80 divisors (see below), whose sum is σ = 69587100. Its totient is φ = 11232000.

The previous prime is 28884983. The next prime is 28885009. The reversal of 28885000 is 58882.

It can be written as a sum of positive squares in 10 ways, for example, as 133956 + 28751044 = 366^2 + 5362^2 .

It is not an unprimeable number, because it can be changed into a prime (28885009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 264946 + ... + 265054.

Almost surely, 2^28885000 is an apocalyptic number.

28885000 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 28885000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34793550).

28885000 is an abundant number, since it is smaller than the sum of its proper divisors (40702100).

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

28885000 is a wasteful number, since it uses less digits than its factorization.

28885000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 28885000 is about 5374.4767187141. The cubic root of 28885000 is about 306.8250337249.

It can be divided in two parts, 2888 and 5000, that multiplied together give a square (14440000 = 3800²).

The spelling of 28885000 in words is "twenty-eight million, eight hundred eighty-five thousand".