28556774 has 4 divisors (see below), whose sum is σ = 42835164. Its totient is φ = 14278386.

The previous prime is 28556747. The next prime is 28556779. The reversal of 28556774 is 47765582.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28556779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7139192 + ... + 7139195.

It is an arithmetic number, because the mean of its divisors is an integer number (10708791).

Almost surely, 2^28556774 is an apocalyptic number.

28556774 is a deficient number, since it is larger than the sum of its proper divisors (14278390).

28556774 is a wasteful number, since it uses less digits than its factorization.

28556774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14278389.

The product of its digits is 470400, while the sum is 44.

The square root of 28556774 is about 5343.8538527920. The cubic root of 28556774 is about 305.6584324343.

The spelling of 28556774 in words is "twenty-eight million, five hundred fifty-six thousand, seven hundred seventy-four".