28656316 has 18 divisors (see below), whose sum is σ = 54304152. Its totient is φ = 13225680.

The previous prime is 28656311. The next prime is 28656317. The reversal of 28656316 is 61365682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28656311) 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 5 ways as a sum of consecutive naturals, for example, 20520 + ... + 21871.

Almost surely, 2^28656316 is an apocalyptic number.

28656316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28656316 is a deficient number, since it is larger than the sum of its proper divisors (25647836).

28656316 is a wasteful number, since it uses less digits than its factorization.

28656316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42421 (or 42406 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 28656316 is about 5353.1594409283. The cubic root of 28656316 is about 306.0131710053.

The spelling of 28656316 in words is "twenty-eight million, six hundred fifty-six thousand, three hundred sixteen".