28605224 has 8 divisors (see below), whose sum is σ = 53634810. Its totient is φ = 14302608.

The previous prime is 28605221. The next prime is 28605233. The reversal of 28605224 is 42250682.

It can be written as a sum of positive squares in only one way, i.e., 16144324 + 12460900 = 4018^2 + 3530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (28605221) 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 as a sum of consecutive naturals, namely, 1787819 + ... + 1787834.

Almost surely, 2^28605224 is an apocalyptic number.

It is an amenable number.

28605224 is a deficient number, since it is larger than the sum of its proper divisors (25029586).

28605224 is a wasteful number, since it uses less digits than its factorization.

28605224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575659 (or 3575655 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 28605224 is about 5348.3851768548. The cubic root of 28605224 is about 305.8311968575.

The spelling of 28605224 in words is "twenty-eight million, six hundred five thousand, two hundred twenty-four".