28755556 has 6 divisors (see below), whose sum is σ = 50322230. Its totient is φ = 14377776.

The previous prime is 28755547. The next prime is 28755581. The reversal of 28755556 is 65555782.

It can be written as a sum of positive squares in only one way, i.e., 17640000 + 11115556 = 4200^2 + 3334^2 .

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 as a sum of consecutive naturals, namely, 3594441 + ... + 3594448.

Almost surely, 2^28755556 is an apocalyptic number.

It is an amenable number.

28755556 is a deficient number, since it is larger than the sum of its proper divisors (21566674).

28755556 is a wasteful number, since it uses less digits than its factorization.

28755556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7188893 (or 7188891 counting only the distinct ones).

The product of its digits is 420000, while the sum is 43.

The square root of 28755556 is about 5362.4207220247. The cubic root of 28755556 is about 306.3660165188.

The spelling of 28755556 in words is "twenty-eight million, seven hundred fifty-five thousand, five hundred fifty-six".