28905338 has 64 divisors (see below), whose sum is σ = 58496256. Its totient is φ = 10368000.

The previous prime is 28905323. The next prime is 28905343. The reversal of 28905338 is 83350982.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159608 + ... + 159788.

It is an arithmetic number, because the mean of its divisors is an integer number (914004).

Almost surely, 2^28905338 is an apocalyptic number.

28905338 is an abundant number, since it is smaller than the sum of its proper divisors (29590918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28905338 is a wasteful number, since it uses less digits than its factorization.

28905338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 28905338 is about 5376.3684769554. The cubic root of 28905338 is about 306.8970289187.

It can be divided in two parts, 2890 and 5338, that added together give a palindrome (8228).

The spelling of 28905338 in words is "twenty-eight million, nine hundred five thousand, three hundred thirty-eight".