28444000577 has 2 divisors, whose sum is σ = 28444000578. Its totient is φ = 28444000576.

The previous prime is 28444000561. The next prime is 28444000583. The reversal of 28444000577 is 77500044482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18738598321 + 9705402256 = 136889^2 + 98516^2 .

It is a cyclic number.

It is not a de Polignac number, because 28444000577 - 2⁴ = 28444000561 is a prime.

It is a super-2 number, since 2×28444000577² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28444000537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14222000288 + 14222000289.

It is an arithmetic number, because the mean of its divisors is an integer number (14222000289).

Almost surely, 2^28444000577 is an apocalyptic number.

It is an amenable number.

28444000577 is a deficient number, since it is larger than the sum of its proper divisors (1).

28444000577 is an equidigital number, since it uses as much as digits as its factorization.

28444000577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250880, while the sum is 41.

The spelling of 28444000577 in words is "twenty-eight billion, four hundred forty-four million, five hundred seventy-seven", and thus it is an aban number.