28988165 has 16 divisors (see below), whose sum is σ = 36747648. Its totient is φ = 21907776.

The previous prime is 28988161. The next prime is 28988171. The reversal of 28988165 is 56188982.

It is not a de Polignac number, because 28988165 - 2² = 28988161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28988161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8027 + ... + 11063.

It is an arithmetic number, because the mean of its divisors is an integer number (2296728).

Almost surely, 2^28988165 is an apocalyptic number.

It is an amenable number.

28988165 is a deficient number, since it is larger than the sum of its proper divisors (7759483).

28988165 is a wasteful number, since it uses less digits than its factorization.

28988165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148.

The product of its digits is 276480, while the sum is 47.

The square root of 28988165 is about 5384.0658428366. The cubic root of 28988165 is about 307.1898827788.

The spelling of 28988165 in words is "twenty-eight million, nine hundred eighty-eight thousand, one hundred sixty-five".