28053500 has 48 divisors (see below), whose sum is σ = 64515360. Its totient is φ = 10627200.

The previous prime is 28053479. The next prime is 28053521. The reversal of 28053500 is 535082.

It is an interprime number because it is at equal distance from previous prime (28053479) and next prime (28053521).

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, 8024 + ... + 10976.

It is an arithmetic number, because the mean of its divisors is an integer number (1344070).

Almost surely, 2^28053500 is an apocalyptic number.

28053500 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 28053500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32257680).

28053500 is an abundant number, since it is smaller than the sum of its proper divisors (36461860).

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

28053500 is a wasteful number, since it uses less digits than its factorization.

28053500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991 (or 2979 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 28053500 is about 5296.5554844635. Note that the first 3 decimals coincide. The cubic root of 28053500 is about 303.8521759372.

Adding to 28053500 its reverse (535082), we get a palindrome (28588582).

The spelling of 28053500 in words is "twenty-eight million, fifty-three thousand, five hundred".