28180578 has 8 divisors (see below), whose sum is σ = 56361168. Its totient is φ = 9393524.

The previous prime is 28180549. The next prime is 28180601. The reversal of 28180578 is 87508182.

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

28180578 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2348376 + ... + 2348387.

It is an arithmetic number, because the mean of its divisors is an integer number (7045146).

Almost surely, 2^28180578 is an apocalyptic number.

28180578 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.

28180578 is a wasteful number, since it uses less digits than its factorization.

28180578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4696768.

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 28180578 is about 5308.5382168729. The cubic root of 28180578 is about 304.3102859720.

The spelling of 28180578 in words is "twenty-eight million, one hundred eighty thousand, five hundred seventy-eight".