28905234 has 8 divisors (see below), whose sum is σ = 57810480. Its totient is φ = 9635076.

The previous prime is 28905229. The next prime is 28905241. The reversal of 28905234 is 43250982.

It is a happy number.

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

28905234 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28905195 and 28905204.

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, 2408764 + ... + 2408775.

It is an arithmetic number, because the mean of its divisors is an integer number (7226310).

Almost surely, 2^28905234 is an apocalyptic number.

28905234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28905234 is a wasteful number, since it uses less digits than its factorization.

28905234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4817544.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 28905234 is about 5376.3588049906. The cubic root of 28905234 is about 306.8966608514.

The spelling of 28905234 in words is "twenty-eight million, nine hundred five thousand, two hundred thirty-four".