28454213 has 2 divisors, whose sum is σ = 28454214. Its totient is φ = 28454212.

The previous prime is 28454201. The next prime is 28454227. The reversal of 28454213 is 31245482.

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., 28376929 + 77284 = 5327^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 28454213 - 2⁶ = 28454149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28454263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14227106 + 14227107.

It is an arithmetic number, because the mean of its divisors is an integer number (14227107).

Almost surely, 2^28454213 is an apocalyptic number.

It is an amenable number.

28454213 is a deficient number, since it is larger than the sum of its proper divisors (1).

28454213 is an equidigital number, since it uses as much as digits as its factorization.

28454213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 29.

The square root of 28454213 is about 5334.2490568027. The cubic root of 28454213 is about 305.2920717377.

Adding to 28454213 its reverse (31245482), we get a palindrome (59699695).

The spelling of 28454213 in words is "twenty-eight million, four hundred fifty-four thousand, two hundred thirteen".