28073144 has 32 divisors (see below), whose sum is σ = 58406400. Its totient is φ = 12541920.

The previous prime is 28073141. The next prime is 28073153. The reversal of 28073144 is 44137082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28073141) 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 7 ways as a sum of consecutive naturals, for example, 2489 + ... + 7895.

It is an arithmetic number, because the mean of its divisors is an integer number (1825200).

Almost surely, 2^28073144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28073144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29203200).

28073144 is an abundant number, since it is smaller than the sum of its proper divisors (30333256).

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

28073144 is a wasteful number, since it uses less digits than its factorization.

28073144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5483 (or 5479 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 28073144 is about 5298.4095726925. The cubic root of 28073144 is about 303.9230818787.

The spelling of 28073144 in words is "twenty-eight million, seventy-three thousand, one hundred forty-four".