28767256 has 64 divisors (see below), whose sum is σ = 64788480. Its totient is φ = 11715840.

The previous prime is 28767251. The next prime is 28767259. The reversal of 28767256 is 65276782.

It is a super-3 number, since 3×28767256³ (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 (28767251) 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, 126615 + ... + 126841.

It is an arithmetic number, because the mean of its divisors is an integer number (1012320).

Almost surely, 2^28767256 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 28767256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32394240).

28767256 is an abundant number, since it is smaller than the sum of its proper divisors (36021224).

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

28767256 is a wasteful number, since it uses less digits than its factorization.

28767256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 340 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 28767256 is about 5363.5115362978. The cubic root of 28767256 is about 306.4075620709.

The spelling of 28767256 in words is "twenty-eight million, seven hundred sixty-seven thousand, two hundred fifty-six".