28253000 has 64 divisors (see below), whose sum is σ = 69638400. Its totient is φ = 10699200.

The previous prime is 28252979. The next prime is 28253011. The reversal of 28253000 is 35282.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18257 + ... + 19743.

It is an arithmetic number, because the mean of its divisors is an integer number (1088100).

Almost surely, 2^28253000 is an apocalyptic number.

28253000 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 28253000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34819200).

28253000 is an abundant number, since it is smaller than the sum of its proper divisors (41385400).

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

28253000 is a wasteful number, since it uses less digits than its factorization.

28253000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 28253000 is about 5315.3551151358. The cubic root of 28253000 is about 304.5707479482.

Adding to 28253000 its reverse (35282), we get a palindrome (28288282).

The spelling of 28253000 in words is "twenty-eight million, two hundred fifty-three thousand".