28113117 has 8 divisors (see below), whose sum is σ = 37574880. Its totient is φ = 18696720.

The previous prime is 28113109. The next prime is 28113119. The reversal of 28113117 is 71131182.

It is a happy number.

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

It is not a de Polignac number, because 28113117 - 2³ = 28113109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28113119) 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, 9867 + ... + 12392.

It is an arithmetic number, because the mean of its divisors is an integer number (4696860).

Almost surely, 2^28113117 is an apocalyptic number.

It is an amenable number.

28113117 is a deficient number, since it is larger than the sum of its proper divisors (9461763).

28113117 is a wasteful number, since it uses less digits than its factorization.

28113117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22683.

The product of its digits is 336, while the sum is 24.

The square root of 28113117 is about 5302.1804005522. The cubic root of 28113117 is about 304.0672642305.

Adding to 28113117 its reverse (71131182), we get a palindrome (99244299).

The spelling of 28113117 in words is "twenty-eight million, one hundred thirteen thousand, one hundred seventeen".