28079500 has 48 divisors (see below), whose sum is σ = 62112960. Its totient is φ = 11088000.

The previous prime is 28079489. The next prime is 28079503. The reversal of 28079500 is 597082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28079503) by changing a digit.

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, 44185 + ... + 44815.

It is an arithmetic number, because the mean of its divisors is an integer number (1294020).

Almost surely, 2^28079500 is an apocalyptic number.

28079500 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 28079500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31056480).

28079500 is an abundant number, since it is smaller than the sum of its proper divisors (34033460).

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

28079500 is a wasteful number, since it uses less digits than its factorization.

28079500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 28079500 is about 5299.0093413769. The cubic root of 28079500 is about 303.9460170766.

The spelling of 28079500 in words is "twenty-eight million, seventy-nine thousand, five hundred".