28557368 has 32 divisors (see below), whose sum is σ = 61800960. Its totient is φ = 12117600.

The previous prime is 28557367. The next prime is 28557379. The reversal of 28557368 is 86375582.

It is a super-3 number, since 3×28557368³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28557367) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3293 + ... + 8243.

It is an arithmetic number, because the mean of its divisors is an integer number (1931280).

Almost surely, 2^28557368 is an apocalyptic number.

28557368 is a gapful number since it is divisible by the number (28) 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 28557368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30900480).

28557368 is an abundant number, since it is smaller than the sum of its proper divisors (33243592).

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

28557368 is a wasteful number, since it uses less digits than its factorization.

28557368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5067 (or 5063 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The square root of 28557368 is about 5343.9094303702. The cubic root of 28557368 is about 305.6605517196.

The spelling of 28557368 in words is "twenty-eight million, five hundred fifty-seven thousand, three hundred sixty-eight".