28255746 has 8 divisors (see below), whose sum is σ = 56511504. Its totient is φ = 9418580.

The previous prime is 28255741. The next prime is 28255757. The reversal of 28255746 is 64755282.

It is a sphenic number, since it is the product of 3 distinct primes.

28255746 is an admirable number.

It is a super-3 number, since 3×28255746³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28255741) 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 3 ways as a sum of consecutive naturals, for example, 2354640 + ... + 2354651.

It is an arithmetic number, because the mean of its divisors is an integer number (7063938).

Almost surely, 2^28255746 is an apocalyptic number.

28255746 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28255746 is a wasteful number, since it uses less digits than its factorization.

28255746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709296.

The product of its digits is 134400, while the sum is 39.

The square root of 28255746 is about 5315.6134170950. The cubic root of 28255746 is about 304.5806150323.

The spelling of 28255746 in words is "twenty-eight million, two hundred fifty-five thousand, seven hundred forty-six".