28351117 has 8 divisors (see below), whose sum is σ = 28877696. Its totient is φ = 27827712.

The previous prime is 28351109. The next prime is 28351159. The reversal of 28351117 is 71115382.

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 28351117 - 2³ = 28351109 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 (28351177) 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, 24013 + ... + 25165.

It is an arithmetic number, because the mean of its divisors is an integer number (3609712).

Almost surely, 2^28351117 is an apocalyptic number.

It is an amenable number.

28351117 is a deficient number, since it is larger than the sum of its proper divisors (526579).

28351117 is a wasteful number, since it uses less digits than its factorization.

28351117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587.

The product of its digits is 1680, while the sum is 28.

The square root of 28351117 is about 5324.5766967901. The cubic root of 28351117 is about 304.9229116294.

Adding to 28351117 its reverse (71115382), we get a palindrome (99466499).

The spelling of 28351117 in words is "twenty-eight million, three hundred fifty-one thousand, one hundred seventeen".