28484939 has 8 divisors (see below), whose sum is σ = 33604608. Its totient is φ = 23627880.

The previous prime is 28484921. The next prime is 28484941. The reversal of 28484939 is 93948482.

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 28484939 - 2⁸ = 28484683 is a prime.

It is a super-3 number, since 3×28484939³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28484893 and 28484902.

It is not an unprimeable number, because it can be changed into a prime (28484909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65417 + ... + 65850.

It is an arithmetic number, because the mean of its divisors is an integer number (4200576).

Almost surely, 2^28484939 is an apocalyptic number.

28484939 is a deficient number, since it is larger than the sum of its proper divisors (5119669).

28484939 is a wasteful number, since it uses less digits than its factorization.

28484939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131305.

The product of its digits is 497664, while the sum is 47.

The square root of 28484939 is about 5337.1283477166. The cubic root of 28484939 is about 305.4019210802.

The spelling of 28484939 in words is "twenty-eight million, four hundred eighty-four thousand, nine hundred thirty-nine".