28478585 has 8 divisors (see below), whose sum is σ = 34494336. Its totient is φ = 22569520.

The previous prime is 28478563. The next prime is 28478591. The reversal of 28478585 is 58587482.

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

It is not a de Polignac number, because 28478585 - 2¹² = 28474489 is a prime.

It is a super-2 number, since 2×28478585² = 1622059607204450, which contains 22 as substring.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 26081 + ... + 27150.

It is an arithmetic number, because the mean of its divisors is an integer number (4311792).

Almost surely, 2^28478585 is an apocalyptic number.

It is an amenable number.

28478585 is a deficient number, since it is larger than the sum of its proper divisors (6015751).

28478585 is a wasteful number, since it uses less digits than its factorization.

28478585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53343.

The product of its digits is 716800, while the sum is 47.

The square root of 28478585 is about 5336.5330505863. The cubic root of 28478585 is about 305.3792112064.

The spelling of 28478585 in words is "twenty-eight million, four hundred seventy-eight thousand, five hundred eighty-five".