28212953 has 2 divisors, whose sum is σ = 28212954. Its totient is φ = 28212952.

The previous prime is 28212949. The next prime is 28212959. The reversal of 28212953 is 35921282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26491609 + 1721344 = 5147^2 + 1312^2 .

It is a cyclic number.

It is not a de Polignac number, because 28212953 - 2² = 28212949 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28212959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14106476 + 14106477.

It is an arithmetic number, because the mean of its divisors is an integer number (14106477).

Almost surely, 2^28212953 is an apocalyptic number.

It is an amenable number.

28212953 is a deficient number, since it is larger than the sum of its proper divisors (1).

28212953 is an equidigital number, since it uses as much as digits as its factorization.

28212953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 28212953 is about 5311.5866744317. The cubic root of 28212953 is about 304.4267760726.

The spelling of 28212953 in words is "twenty-eight million, two hundred twelve thousand, nine hundred fifty-three".