28217068 has 48 divisors (see below), whose sum is σ = 56383488. Its totient is φ = 12240000.

The previous prime is 28217047. The next prime is 28217069. The reversal of 28217068 is 86071282.

It is not an unprimeable number, because it can be changed into a prime (28217069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186793 + ... + 186943.

It is an arithmetic number, because the mean of its divisors is an integer number (1174656).

Almost surely, 2^28217068 is an apocalyptic number.

It is an amenable number.

28217068 is a deficient number, since it is larger than the sum of its proper divisors (28166420).

28217068 is a wasteful number, since it uses less digits than its factorization.

28217068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 28217068 is about 5311.9740210208. The cubic root of 28217068 is about 304.4415760746.

It can be divided in two parts, 2821 and 7068, that added together give a palindrome (9889).

The spelling of 28217068 in words is "twenty-eight million, two hundred seventeen thousand, sixty-eight".