28641165 has 32 divisors (see below), whose sum is σ = 53657856. Its totient is φ = 12771840.

The previous prime is 28641161. The next prime is 28641169. The reversal of 28641165 is 56114682.

It is an interprime number because it is at equal distance from previous prime (28641161) and next prime (28641169).

It is not a de Polignac number, because 28641165 - 2² = 28641161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28641161) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 979 + ... + 7631.

It is an arithmetic number, because the mean of its divisors is an integer number (1676808).

Almost surely, 2^28641165 is an apocalyptic number.

It is an amenable number.

28641165 is a deficient number, since it is larger than the sum of its proper divisors (25016691).

28641165 is a wasteful number, since it uses less digits than its factorization.

28641165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6709.

The product of its digits is 11520, while the sum is 33.

The square root of 28641165 is about 5351.7441082324. The cubic root of 28641165 is about 305.9592303323.

The spelling of 28641165 in words is "twenty-eight million, six hundred forty-one thousand, one hundred sixty-five".