28280090 has 16 divisors (see below), whose sum is σ = 51017472. Its totient is φ = 11286864.

The previous prime is 28280069. The next prime is 28280107. The reversal of 28280090 is 9008282.

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 7 ways as a sum of consecutive naturals, for example, 1967 + ... + 7773.

It is an arithmetic number, because the mean of its divisors is an integer number (3188592).

Almost surely, 2^28280090 is an apocalyptic number.

28280090 is a deficient number, since it is larger than the sum of its proper divisors (22737382).

28280090 is a wasteful number, since it uses less digits than its factorization.

28280090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6301.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 28280090 is about 5317.9027821125. The cubic root of 28280090 is about 304.6680613415.

The spelling of 28280090 in words is "twenty-eight million, two hundred eighty thousand, ninety".