28047356 has 12 divisors (see below), whose sum is σ = 49589568. Its totient is φ = 13878912.

The previous prime is 28047347. The next prime is 28047359. The reversal of 28047356 is 65374082.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28047359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35756 + ... + 36531.

It is an arithmetic number, because the mean of its divisors is an integer number (4132464).

Almost surely, 2^28047356 is an apocalyptic number.

It is an amenable number.

28047356 is a deficient number, since it is larger than the sum of its proper divisors (21542212).

28047356 is a wasteful number, since it uses less digits than its factorization.

28047356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72388 (or 72386 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 28047356 is about 5295.9754531153. The cubic root of 28047356 is about 303.8299920853.

The spelling of 28047356 in words is "twenty-eight million, forty-seven thousand, three hundred fifty-six".