28165951 has 8 divisors (see below), whose sum is σ = 31248000. Its totient is φ = 25170840.

The previous prime is 28165937. The next prime is 28165981. The reversal of 28165951 is 15956182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28165951 - 2¹⁷ = 28034879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28165951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28165901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21051 + ... + 22348.

It is an arithmetic number, because the mean of its divisors is an integer number (3906000).

Almost surely, 2^28165951 is an apocalyptic number.

28165951 is a deficient number, since it is larger than the sum of its proper divisors (3082049).

28165951 is a wasteful number, since it uses less digits than its factorization.

28165951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43469.

The product of its digits is 21600, while the sum is 37.

The square root of 28165951 is about 5307.1603518266. The cubic root of 28165951 is about 304.2576265731.

The spelling of 28165951 in words is "twenty-eight million, one hundred sixty-five thousand, nine hundred fifty-one".