28223941 has 2 divisors, whose sum is σ = 28223942. Its totient is φ = 28223940.

The previous prime is 28223929. The next prime is 28224011. The reversal of 28223941 is 14932282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14791716 + 13432225 = 3846^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 28223941 - 2⁷ = 28223813 is a prime.

It is equal to p_1754482 and since 28223941 and 1754482 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28223141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14111970 + 14111971.

It is an arithmetic number, because the mean of its divisors is an integer number (14111971).

Almost surely, 2^28223941 is an apocalyptic number.

It is an amenable number.

28223941 is a deficient number, since it is larger than the sum of its proper divisors (1).

28223941 is an equidigital number, since it uses as much as digits as its factorization.

28223941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 28223941 is about 5312.6209162710. The cubic root of 28223941 is about 304.4662922864.

The spelling of 28223941 in words is "twenty-eight million, two hundred twenty-three thousand, nine hundred forty-one".