28658166 has 16 divisors (see below), whose sum is σ = 58256688. Its totient is φ = 9396000.

The previous prime is 28658153. The next prime is 28658173. The reversal of 28658166 is 66185682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38785 + ... + 39516.

It is an arithmetic number, because the mean of its divisors is an integer number (3641043).

Almost surely, 2^28658166 is an apocalyptic number.

28658166 is an abundant number, since it is smaller than the sum of its proper divisors (29598522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28658166 is a wasteful number, since it uses less digits than its factorization.

28658166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78367.

The product of its digits is 138240, while the sum is 42.

The square root of 28658166 is about 5353.3322332917. The cubic root of 28658166 is about 306.0197560828.

The spelling of 28658166 in words is "twenty-eight million, six hundred fifty-eight thousand, one hundred sixty-six".