28523000 has 64 divisors (see below), whose sum is σ = 72839520. Its totient is φ = 10368000.

The previous prime is 28522993. The next prime is 28523081. The reversal of 28523000 is 32582.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9704 + ... + 12296.

Almost surely, 2^28523000 is an apocalyptic number.

28523000 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 28523000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36419760).

28523000 is an abundant number, since it is smaller than the sum of its proper divisors (44316520).

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

28523000 is a wasteful number, since it uses less digits than its factorization.

28523000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625 (or 2611 counting only the distinct ones).

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

The square root of 28523000 is about 5340.6928389489. The cubic root of 28523000 is about 305.5378844999.

Adding to 28523000 its reverse (32582), we get a palindrome (28555582).

The spelling of 28523000 in words is "twenty-eight million, five hundred twenty-three thousand".