28033656 has 32 divisors (see below), whose sum is σ = 80096640. Its totient is φ = 8009568.

The previous prime is 28033651. The next prime is 28033657. The reversal of 28033656 is 65633082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28033651) 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 7 ways as a sum of consecutive naturals, for example, 83266 + ... + 83601.

It is an arithmetic number, because the mean of its divisors is an integer number (2503020).

Almost surely, 2^28033656 is an apocalyptic number.

It is an amenable number.

28033656 is an abundant number, since it is smaller than the sum of its proper divisors (52062984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28033656 is a wasteful number, since it uses less digits than its factorization.

28033656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166883 (or 166879 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 28033656 is about 5294.6818601310. The cubic root of 28033656 is about 303.7805144707.

The spelling of 28033656 in words is "twenty-eight million, thirty-three thousand, six hundred fifty-six".