28164155 has 16 divisors (see below), whose sum is σ = 36080640. Its totient is φ = 21030912.

The previous prime is 28164119. The next prime is 28164197. The reversal of 28164155 is 55146182.

It is a cyclic number.

It is not a de Polignac number, because 28164155 - 2⁶ = 28164091 is a prime.

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, 9491 + ... + 12099.

It is an arithmetic number, because the mean of its divisors is an integer number (2255040).

Almost surely, 2^28164155 is an apocalyptic number.

28164155 is a deficient number, since it is larger than the sum of its proper divisors (7916485).

28164155 is a wasteful number, since it uses less digits than its factorization.

28164155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758.

The product of its digits is 9600, while the sum is 32.

The square root of 28164155 is about 5306.9911437650. The cubic root of 28164155 is about 304.2511594465.

The spelling of 28164155 in words is "twenty-eight million, one hundred sixty-four thousand, one hundred fifty-five".