28020600 has 96 divisors (see below), whose sum is σ = 96534000. Its totient is φ = 7470720.

The previous prime is 28020569. The next prime is 28020613. The reversal of 28020600 is 602082.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2806 + ... + 7994.

Almost surely, 2^28020600 is an apocalyptic number.

28020600 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 28020600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48267000).

28020600 is an abundant number, since it is smaller than the sum of its proper divisors (68513400).

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

28020600 is a wasteful number, since it uses less digits than its factorization.

28020600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214 (or 5199 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 28020600 is about 5293.4487812767. The cubic root of 28020600 is about 303.7333476620.

Adding to 28020600 its reverse (602082), we get a palindrome (28622682).

The spelling of 28020600 in words is "twenty-eight million, twenty thousand, six hundred".