28843949 has 2 divisors, whose sum is σ = 28843950. Its totient is φ = 28843948.

The previous prime is 28843939. The next prime is 28843993. The reversal of 28843949 is 94934882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28015849 + 828100 = 5293^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 28843949 - 2⁴ = 28843933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28843939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14421974 + 14421975.

It is an arithmetic number, because the mean of its divisors is an integer number (14421975).

Almost surely, 2^28843949 is an apocalyptic number.

It is an amenable number.

28843949 is a deficient number, since it is larger than the sum of its proper divisors (1).

28843949 is an equidigital number, since it uses as much as digits as its factorization.

28843949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 47.

The square root of 28843949 is about 5370.6562913670. The cubic root of 28843949 is about 306.6796128488.

It can be divided in two parts, 28843 and 949, that added together give a palindrome (29792).

The spelling of 28843949 in words is "twenty-eight million, eight hundred forty-three thousand, nine hundred forty-nine".