28229008 has 10 divisors (see below), whose sum is σ = 54693734. Its totient is φ = 14114496.

The previous prime is 28228973. The next prime is 28229009. The reversal of 28229008 is 80092282.

It can be written as a sum of positive squares in only one way, i.e., 28217344 + 11664 = 5312^2 + 108^2 .

It is not an unprimeable number, because it can be changed into a prime (28229009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 882141 + ... + 882172.

Almost surely, 2^28229008 is an apocalyptic number.

It is an amenable number.

28229008 is a deficient number, since it is larger than the sum of its proper divisors (26464726).

28229008 is a wasteful number, since it uses less digits than its factorization.

28229008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764321 (or 1764315 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 28229008 is about 5313.0977781328. The cubic root of 28229008 is about 304.4845113153.

The spelling of 28229008 in words is "twenty-eight million, two hundred twenty-nine thousand, eight".