28217495 has 16 divisors (see below), whose sum is σ = 35079168. Its totient is φ = 21772800.

The previous prime is 28217477. The next prime is 28217507. The reversal of 28217495 is 59471282.

It is not a de Polignac number, because 28217495 - 2⁸ = 28217239 is a prime.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22895 + ... + 24095.

It is an arithmetic number, because the mean of its divisors is an integer number (2192448).

Almost surely, 2^28217495 is an apocalyptic number.

28217495 is a deficient number, since it is larger than the sum of its proper divisors (6861673).

28217495 is a wasteful number, since it uses less digits than its factorization.

28217495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370.

The product of its digits is 40320, while the sum is 38.

The square root of 28217495 is about 5312.0142130834. The cubic root of 28217495 is about 304.4431117397.

The spelling of 28217495 in words is "twenty-eight million, two hundred seventeen thousand, four hundred ninety-five".