28663146 has 20 divisors (see below), whose sum is σ = 64227042. Its totient is φ = 9554328.

The previous prime is 28663121. The next prime is 28663157. The reversal of 28663146 is 64136682.

It can be written as a sum of positive squares in only one way, i.e., 17514225 + 11148921 = 4185^2 + 3339^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28663146.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 88305 + ... + 88628.

Almost surely, 2^28663146 is an apocalyptic number.

28663146 is an abundant number, since it is smaller than the sum of its proper divisors (35563896).

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

28663146 is a wasteful number, since it uses less digits than its factorization.

28663146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176947 (or 176938 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 28663146 is about 5353.7973439420. The cubic root of 28663146 is about 306.0374809914.

The spelling of 28663146 in words is "twenty-eight million, six hundred sixty-three thousand, one hundred forty-six".