28651288 has 16 divisors (see below), whose sum is σ = 53788680. Its totient is φ = 14307648.

The previous prime is 28651279. The next prime is 28651291. The reversal of 28651288 is 88215682.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28651288.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 6531 + ... + 9997.

Almost surely, 2^28651288 is an apocalyptic number.

It is an amenable number.

28651288 is a deficient number, since it is larger than the sum of its proper divisors (25137392).

28651288 is a wasteful number, since it uses less digits than its factorization.

28651288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506 (or 4502 counting only the distinct ones).

The product of its digits is 61440, while the sum is 40.

The square root of 28651288 is about 5352.6897911237. The cubic root of 28651288 is about 305.9952724005.

The spelling of 28651288 in words is "twenty-eight million, six hundred fifty-one thousand, two hundred eighty-eight".