28236345 has 16 divisors (see below), whose sum is σ = 45816192. Its totient is φ = 14846720.

The previous prime is 28236311. The next prime is 28236347. The reversal of 28236345 is 54363282.

It is a happy number.

It is not a de Polignac number, because 28236345 - 2¹² = 28232249 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28236347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12192 + ... + 14321.

It is an arithmetic number, because the mean of its divisors is an integer number (2863512).

Almost surely, 2^28236345 is an apocalyptic number.

It is an amenable number.

28236345 is a deficient number, since it is larger than the sum of its proper divisors (17579847).

28236345 is a wasteful number, since it uses less digits than its factorization.

28236345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26592.

The product of its digits is 34560, while the sum is 33.

The square root of 28236345 is about 5313.7881967576. The cubic root of 28236345 is about 304.5108885481.

The spelling of 28236345 in words is "twenty-eight million, two hundred thirty-six thousand, three hundred forty-five".