28893973 has 2 divisors, whose sum is σ = 28893974. Its totient is φ = 28893972.

The previous prime is 28893961. The next prime is 28893989. The reversal of 28893973 is 37939882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 8625969 = 4502^2 + 2937^2 .

It is a cyclic number.

It is not a de Polignac number, because 28893973 - 2⁹ = 28893461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28893923) 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 as a sum of consecutive naturals, namely, 14446986 + 14446987.

It is an arithmetic number, because the mean of its divisors is an integer number (14446987).

Almost surely, 2^28893973 is an apocalyptic number.

It is an amenable number.

28893973 is a deficient number, since it is larger than the sum of its proper divisors (1).

28893973 is an equidigital number, since it uses as much as digits as its factorization.

28893973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 28893973 is about 5375.3114328381. The cubic root of 28893973 is about 306.8568017243.

The spelling of 28893973 in words is "twenty-eight million, eight hundred ninety-three thousand, nine hundred seventy-three".