28083956 has 12 divisors (see below), whose sum is σ = 49359492. Its totient is φ = 13981248.

The previous prime is 28083953. The next prime is 28083961. The reversal of 28083956 is 65938082.

It can be written as a sum of positive squares in 2 ways, for example, as 7107556 + 20976400 = 2666^2 + 4580^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28083953) 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 in 3 ways as a sum of consecutive naturals, for example, 14135 + ... + 15998.

It is an arithmetic number, because the mean of its divisors is an integer number (4113291).

Almost surely, 2^28083956 is an apocalyptic number.

It is an amenable number.

28083956 is a deficient number, since it is larger than the sum of its proper divisors (21275536).

28083956 is a wasteful number, since it uses less digits than its factorization.

28083956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30370 (or 30368 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 28083956 is about 5299.4297806462. The cubic root of 28083956 is about 303.9620941888.

The spelling of 28083956 in words is "twenty-eight million, eighty-three thousand, nine hundred fifty-six".