28020750 has 32 divisors (see below), whose sum is σ = 69941664. Its totient is φ = 7472000.

The previous prime is 28020749. The next prime is 28020793. The reversal of 28020750 is 5702082.

It is a self number, because there is not a number n which added to its sum of digits gives 28020750.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17931 + ... + 19430.

It is an arithmetic number, because the mean of its divisors is an integer number (2185677).

Almost surely, 2^28020750 is an apocalyptic number.

28020750 is an abundant number, since it is smaller than the sum of its proper divisors (41920914).

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

28020750 is a wasteful number, since it uses less digits than its factorization.

28020750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37381 (or 37371 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 28020750 is about 5293.4629497145. The cubic root of 28020750 is about 303.7338896433.

The spelling of 28020750 in words is "twenty-eight million, twenty thousand, seven hundred fifty".