28083556 has 6 divisors (see below), whose sum is σ = 49146230. Its totient is φ = 14041776.

The previous prime is 28083547. The next prime is 28083563. The reversal of 28083556 is 65538082.

It can be written as a sum of positive squares in only one way, i.e., 24601600 + 3481956 = 4960^2 + 1866^2 .

It is a super-2 number, since 2×28083556² = 1577372235210272, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3510441 + ... + 3510448.

Almost surely, 2^28083556 is an apocalyptic number.

It is an amenable number.

28083556 is a deficient number, since it is larger than the sum of its proper divisors (21062674).

28083556 is a wasteful number, since it uses less digits than its factorization.

28083556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020893 (or 7020891 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 28083556 is about 5299.3920406024. The cubic root of 28083556 is about 303.9606510704.

The spelling of 28083556 in words is "twenty-eight million, eighty-three thousand, five hundred fifty-six".