28421185 has 16 divisors (see below), whose sum is σ = 37356480. Its totient is φ = 20629440.

The previous prime is 28421167. The next prime is 28421209. The reversal of 28421185 is 58112482.

It is not a de Polignac number, because 28421185 - 2⁹ = 28420673 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 130 + ... + 7540.

It is an arithmetic number, because the mean of its divisors is an integer number (2334780).

Almost surely, 2^28421185 is an apocalyptic number.

It is an amenable number.

28421185 is a deficient number, since it is larger than the sum of its proper divisors (8935295).

28421185 is a wasteful number, since it uses less digits than its factorization.

28421185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7488.

The product of its digits is 5120, while the sum is 31.

The square root of 28421185 is about 5331.1523144626. The cubic root of 28421185 is about 305.1739042289.

The spelling of 28421185 in words is "twenty-eight million, four hundred twenty-one thousand, one hundred eighty-five".