28513833 has 8 divisors (see below), whose sum is σ = 38139648. Its totient is φ = 18948624.

The previous prime is 28513801. The next prime is 28513861. The reversal of 28513833 is 33831582.

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

It is not a de Polignac number, because 28513833 - 2⁵ = 28513801 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28513794 and 28513803.

It is not an unprimeable number, because it can be changed into a prime (28513883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14041 + ... + 15942.

It is an arithmetic number, because the mean of its divisors is an integer number (4767456).

Almost surely, 2^28513833 is an apocalyptic number.

It is an amenable number.

28513833 is a deficient number, since it is larger than the sum of its proper divisors (9625815).

28513833 is a wasteful number, since it uses less digits than its factorization.

28513833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30303.

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

The square root of 28513833 is about 5339.8345479987. The cubic root of 28513833 is about 305.5051487440.

The spelling of 28513833 in words is "twenty-eight million, five hundred thirteen thousand, eight hundred thirty-three".