28344961 has 2 divisors, whose sum is σ = 28344962. Its totient is φ = 28344960.

The previous prime is 28344949. The next prime is 28344989. The reversal of 28344961 is 16944382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24561936 + 3783025 = 4956^2 + 1945^2 .

It is a cyclic number.

It is not a de Polignac number, because 28344961 - 2⁵ = 28344929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28344961.

It is not a weakly prime, because it can be changed into another prime (28344061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14172480 + 14172481.

It is an arithmetic number, because the mean of its divisors is an integer number (14172481).

Almost surely, 2^28344961 is an apocalyptic number.

It is an amenable number.

28344961 is a deficient number, since it is larger than the sum of its proper divisors (1).

28344961 is an equidigital number, since it uses as much as digits as its factorization.

28344961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 28344961 is about 5323.9985912846. The cubic root of 28344961 is about 304.9008402906.

The spelling of 28344961 in words is "twenty-eight million, three hundred forty-four thousand, nine hundred sixty-one".