28604256 has 48 divisors (see below), whose sum is σ = 77125104. Its totient is φ = 9275904.

The previous prime is 28604239. The next prime is 28604263. The reversal of 28604256 is 65240682.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×28604256² = 1636406922627072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 475 + ... + 7578.

It is an arithmetic number, because the mean of its divisors is an integer number (1606773).

Almost surely, 2^28604256 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 28604256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38562552).

28604256 is an abundant number, since it is smaller than the sum of its proper divisors (48520848).

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

28604256 is a wasteful number, since it uses less digits than its factorization.

28604256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8103 (or 8095 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 28604256 is about 5348.2946814849. The cubic root of 28604256 is about 305.8277470455.

The spelling of 28604256 in words is "twenty-eight million, six hundred four thousand, two hundred fifty-six".