28344761 has 2 divisors, whose sum is σ = 28344762. Its totient is φ = 28344760.

The previous prime is 28344739. The next prime is 28344773. The reversal of 28344761 is 16744382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24810361 + 3534400 = 4981^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 28344761 - 2¹⁸ = 28082617 is a prime.

It is a super-2 number, since 2×28344761² = 1606850952294242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28344731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14172380 + 14172381.

It is an arithmetic number, because the mean of its divisors is an integer number (14172381).

Almost surely, 2^28344761 is an apocalyptic number.

It is an amenable number.

28344761 is a deficient number, since it is larger than the sum of its proper divisors (1).

28344761 is an equidigital number, since it uses as much as digits as its factorization.

28344761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 28344761 is about 5323.9798083764. The cubic root of 28344761 is about 304.9001231695.

The spelling of 28344761 in words is "twenty-eight million, three hundred forty-four thousand, seven hundred sixty-one".