28228708 has 12 divisors (see below), whose sum is σ = 50138032. Its totient is φ = 13903560.

The previous prime is 28228691. The next prime is 28228709. The reversal of 28228708 is 80782282.

It is not an unprimeable number, because it can be changed into a prime (28228709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52398 + ... + 52933.

Almost surely, 2^28228708 is an apocalyptic number.

It is an amenable number.

28228708 is a deficient number, since it is larger than the sum of its proper divisors (21909324).

28228708 is a wasteful number, since it uses less digits than its factorization.

28228708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105402 (or 105400 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 28228708 is about 5313.0695459405. The cubic root of 28228708 is about 304.4834326887.

The spelling of 28228708 in words is "twenty-eight million, two hundred twenty-eight thousand, seven hundred eight".