28793573 has 2 divisors, whose sum is σ = 28793574. Its totient is φ = 28793572.

The previous prime is 28793561. The next prime is 28793581. The reversal of 28793573 is 37539782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26853124 + 1940449 = 5182^2 + 1393^2 .

It is a cyclic number.

It is not a de Polignac number, because 28793573 - 2²⁴ = 12016357 is a prime.

It is a super-2 number, since 2×28793573² = 1658139692212658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28793473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14396786 + 14396787.

It is an arithmetic number, because the mean of its divisors is an integer number (14396787).

Almost surely, 2^28793573 is an apocalyptic number.

It is an amenable number.

28793573 is a deficient number, since it is larger than the sum of its proper divisors (1).

28793573 is an equidigital number, since it uses as much as digits as its factorization.

28793573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 44.

The square root of 28793573 is about 5365.9643122183. The cubic root of 28793573 is about 306.5009700078.

The spelling of 28793573 in words is "twenty-eight million, seven hundred ninety-three thousand, five hundred seventy-three".