28031573 has 2 divisors, whose sum is σ = 28031574. Its totient is φ = 28031572.

The previous prime is 28031557. The next prime is 28031587. The reversal of 28031573 is 37513082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26646244 + 1385329 = 5162^2 + 1177^2 .

It is a cyclic number.

It is not a de Polignac number, because 28031573 - 2⁴ = 28031557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28031543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14015786 + 14015787.

It is an arithmetic number, because the mean of its divisors is an integer number (14015787).

Almost surely, 2^28031573 is an apocalyptic number.

It is an amenable number.

28031573 is a deficient number, since it is larger than the sum of its proper divisors (1).

28031573 is an equidigital number, since it uses as much as digits as its factorization.

28031573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 28031573 is about 5294.4851496628. The cubic root of 28031573 is about 303.7729902947.

The spelling of 28031573 in words is "twenty-eight million, thirty-one thousand, five hundred seventy-three".