28556233 has 8 divisors (see below), whose sum is σ = 29030400. Its totient is φ = 28085328.

The previous prime is 28556201. The next prime is 28556237. The reversal of 28556233 is 33265582.

It is a happy number.

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 28556233 - 2⁵ = 28556201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28556237) 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, 21688 + ... + 22966.

It is an arithmetic number, because the mean of its divisors is an integer number (3628800).

Almost surely, 2^28556233 is an apocalyptic number.

It is an amenable number.

28556233 is a deficient number, since it is larger than the sum of its proper divisors (474167).

28556233 is a wasteful number, since it uses less digits than its factorization.

28556233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631.

The product of its digits is 43200, while the sum is 34.

The square root of 28556233 is about 5343.8032336530. The cubic root of 28556233 is about 305.6565022180.

The spelling of 28556233 in words is "twenty-eight million, five hundred fifty-six thousand, two hundred thirty-three".