28478485 has 32 divisors (see below), whose sum is σ = 43172352. Its totient is φ = 17571840.

The previous prime is 28478467. The next prime is 28478497. The reversal of 28478485 is 58487482.

It is a happy number.

It is not a de Polignac number, because 28478485 - 2¹³ = 28470293 is a prime.

It is a super-2 number, since 2×28478485² = 1622048215790450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 12645 + ... + 14725.

It is an arithmetic number, because the mean of its divisors is an integer number (1349136).

Almost surely, 2^28478485 is an apocalyptic number.

It is an amenable number.

28478485 is a deficient number, since it is larger than the sum of its proper divisors (14693867).

28478485 is a wasteful number, since it uses less digits than its factorization.

28478485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133.

The product of its digits is 573440, while the sum is 46.

The square root of 28478485 is about 5336.5236811992. The cubic root of 28478485 is about 305.3788537687.

The spelling of 28478485 in words is "twenty-eight million, four hundred seventy-eight thousand, four hundred eighty-five".