28886605 has 16 divisors (see below), whose sum is σ = 37977984. Its totient is φ = 20918080.

The previous prime is 28886579. The next prime is 28886617. The reversal of 28886605 is 50668882.

28886605 = T₃₃₁ + T₃₃₂ + ... + T₅₉₃.

It is a happy number.

It is not a de Polignac number, because 28886605 - 2¹⁷ = 28755533 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 13467 + ... + 15463.

It is an arithmetic number, because the mean of its divisors is an integer number (2373624).

Almost surely, 2^28886605 is an apocalyptic number.

It is an amenable number.

28886605 is a deficient number, since it is larger than the sum of its proper divisors (9091379).

28886605 is a wasteful number, since it uses less digits than its factorization.

28886605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276.

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 28886605 is about 5374.6260335022. The cubic root of 28886605 is about 306.8307165482.

The spelling of 28886605 in words is "twenty-eight million, eight hundred eighty-six thousand, six hundred five".