28034993 has 16 divisors (see below), whose sum is σ = 32919936. Its totient is φ = 23379840.

The previous prime is 28034977. The next prime is 28035001. The reversal of 28034993 is 39943082.

It is a cyclic number.

It is not a de Polignac number, because 28034993 - 2⁴ = 28034977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28034593) 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, 42083 + ... + 42743.

It is an arithmetic number, because the mean of its divisors is an integer number (2057496).

Almost surely, 2^28034993 is an apocalyptic number.

It is an amenable number.

28034993 is a deficient number, since it is larger than the sum of its proper divisors (4884943).

28034993 is an equidigital number, since it uses as much as digits as its factorization.

28034993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 28034993 is about 5294.8081173920. The cubic root of 28034993 is about 303.7853437622.

The spelling of 28034993 in words is "twenty-eight million, thirty-four thousand, nine hundred ninety-three".