28057344 has 144 divisors (see below), whose sum is σ = 90655488. Its totient is φ = 7520256.

The previous prime is 28057343. The next prime is 28057349. The reversal of 28057344 is 44375082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91239 + ... + 91545.

It is an arithmetic number, because the mean of its divisors is an integer number (629552).

Almost surely, 2^28057344 is an apocalyptic number.

28057344 is a gapful number since it is divisible by the number (24) 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 28057344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45327744).

28057344 is an abundant number, since it is smaller than the sum of its proper divisors (62598144).

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

28057344 is a wasteful number, since it uses less digits than its factorization.

28057344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 28057344 is about 5296.9183493801. The cubic root of 28057344 is about 303.8660536402.

The spelling of 28057344 in words is "twenty-eight million, fifty-seven thousand, three hundred forty-four".