28542165 has 16 divisors (see below), whose sum is σ = 47141376. Its totient is φ = 14731200.

The previous prime is 28542139. The next prime is 28542179. The reversal of 28542165 is 56124582.

It is not a de Polignac number, because 28542165 - 2¹¹ = 28540117 is a prime.

It is a Curzon 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, 30226 + ... + 31155.

It is an arithmetic number, because the mean of its divisors is an integer number (2946336).

Almost surely, 2^28542165 is an apocalyptic number.

It is an amenable number.

28542165 is a deficient number, since it is larger than the sum of its proper divisors (18599211).

28542165 is a wasteful number, since it uses less digits than its factorization.

28542165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61420.

The product of its digits is 19200, while the sum is 33.

The square root of 28542165 is about 5342.4867805171. The cubic root of 28542165 is about 305.6063008955.

The spelling of 28542165 in words is "twenty-eight million, five hundred forty-two thousand, one hundred sixty-five".