28073920 has 112 divisors (see below), whose sum is σ = 77833728. Its totient is φ = 9446400.

The previous prime is 28073917. The next prime is 28073923. The reversal of 28073920 is 2937082.

It is an interprime number because it is at equal distance from previous prime (28073917) and next prime (28073923).

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28073923) 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, 185845 + ... + 185995.

It is an arithmetic number, because the mean of its divisors is an integer number (694944).

Almost surely, 2^28073920 is an apocalyptic number.

28073920 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 28073920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38916864).

28073920 is an abundant number, since it is smaller than the sum of its proper divisors (49759808).

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

28073920 is a wasteful number, since it uses less digits than its factorization.

28073920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 28073920 is about 5298.4828017084. The cubic root of 28073920 is about 303.9258822079.

The spelling of 28073920 in words is "twenty-eight million, seventy-three thousand, nine hundred twenty".