28161417 has 8 divisors (see below), whose sum is σ = 37672096. Its totient is φ = 18712512.

The previous prime is 28161389. The next prime is 28161421. The reversal of 28161417 is 71416182.

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

It is not a de Polignac number, because 28161417 - 2¹⁰ = 28160393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28161487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14368 + ... + 16209.

It is an arithmetic number, because the mean of its divisors is an integer number (4709012).

Almost surely, 2^28161417 is an apocalyptic number.

It is an amenable number.

28161417 is a deficient number, since it is larger than the sum of its proper divisors (9510679).

28161417 is a wasteful number, since it uses less digits than its factorization.

28161417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30887.

The product of its digits is 2688, while the sum is 30.

The square root of 28161417 is about 5306.7331758814. The cubic root of 28161417 is about 304.2412997901.

Adding to 28161417 its reverse (71416182), we get a palindrome (99577599).

The spelling of 28161417 in words is "twenty-eight million, one hundred sixty-one thousand, four hundred seventeen".