28418317 has 8 divisors (see below), whose sum is σ = 29813760. Its totient is φ = 27036240.

The previous prime is 28418303. The next prime is 28418329. The reversal of 28418317 is 71381482.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28418317 is a prime.

It is a super-2 number, since 2×28418317² = 1615201482224978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28418387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1159 + ... + 7627.

It is an arithmetic number, because the mean of its divisors is an integer number (3726720).

Almost surely, 2^28418317 is an apocalyptic number.

It is an amenable number.

28418317 is a deficient number, since it is larger than the sum of its proper divisors (1395443).

28418317 is a wasteful number, since it uses less digits than its factorization.

28418317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6683.

The product of its digits is 10752, while the sum is 34.

The square root of 28418317 is about 5330.8833226774. The cubic root of 28418317 is about 305.1636387855.

Adding to 28418317 its reverse (71381482), we get a palindrome (99799799).

The spelling of 28418317 in words is "twenty-eight million, four hundred eighteen thousand, three hundred seventeen".