28897333 has 16 divisors (see below), whose sum is σ = 31179456. Its totient is φ = 26732160.

The previous prime is 28897313. The next prime is 28897343. The reversal of 28897333 is 33379882.

It is a cyclic number.

It is not a de Polignac number, because 28897333 - 2¹³ = 28889141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 28897333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28897303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65010 + ... + 65452.

It is an arithmetic number, because the mean of its divisors is an integer number (1948716).

Almost surely, 2^28897333 is an apocalyptic number.

It is an amenable number.

28897333 is a deficient number, since it is larger than the sum of its proper divisors (2282123).

28897333 is a wasteful number, since it uses less digits than its factorization.

28897333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its digits is 217728, while the sum is 43.

The square root of 28897333 is about 5375.6239637832. The cubic root of 28897333 is about 306.8686957721.

The spelling of 28897333 in words is "twenty-eight million, eight hundred ninety-seven thousand, three hundred thirty-three".