28333556 has 6 divisors (see below), whose sum is σ = 49583730. Its totient is φ = 14166776.

The previous prime is 28333553. The next prime is 28333561. The reversal of 28333556 is 65533382.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 8797156 = 4420^2 + 2966^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28333553) 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 as a sum of consecutive naturals, namely, 3541691 + ... + 3541698.

It is an arithmetic number, because the mean of its divisors is an integer number (8263955).

Almost surely, 2^28333556 is an apocalyptic number.

It is an amenable number.

28333556 is a deficient number, since it is larger than the sum of its proper divisors (21250174).

28333556 is a wasteful number, since it uses less digits than its factorization.

28333556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7083393 (or 7083391 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 28333556 is about 5322.9273900740. The cubic root of 28333556 is about 304.8599410683.

The spelling of 28333556 in words is "twenty-eight million, three hundred thirty-three thousand, five hundred fifty-six".