28418506 has 8 divisors (see below), whose sum is σ = 44002944. Its totient is φ = 13750860.

The previous prime is 28418491. The next prime is 28418513. The reversal of 28418506 is 60581482.

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

It is a super-3 number, since 3×28418506³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229120 + ... + 229243.

It is an arithmetic number, because the mean of its divisors is an integer number (5500368).

Almost surely, 2^28418506 is an apocalyptic number.

28418506 is a deficient number, since it is larger than the sum of its proper divisors (15584438).

28418506 is a wasteful number, since it uses less digits than its factorization.

28418506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458396.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 28418506 is about 5330.9010495412. The cubic root of 28418506 is about 305.1643152952.

Adding to 28418506 its reverse (60581482), we get a palindrome (88999988).

The spelling of 28418506 in words is "twenty-eight million, four hundred eighteen thousand, five hundred six".