28090578 has 8 divisors (see below), whose sum is σ = 56181168. Its totient is φ = 9363524.

The previous prime is 28090577. The next prime is 28090591. The reversal of 28090578 is 87509082.

It is a sphenic number, since it is the product of 3 distinct primes.

28090578 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28090577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2340876 + ... + 2340887.

It is an arithmetic number, because the mean of its divisors is an integer number (7022646).

Almost surely, 2^28090578 is an apocalyptic number.

28090578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28090578 is a wasteful number, since it uses less digits than its factorization.

28090578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4681768.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 28090578 is about 5300.0545280214. The cubic root of 28090578 is about 303.9859830218.

The spelling of 28090578 in words is "twenty-eight million, ninety thousand, five hundred seventy-eight".