28404948773 has 2 divisors, whose sum is σ = 28404948774. Its totient is φ = 28404948772.

The previous prime is 28404948749. The next prime is 28404948799. The reversal of 28404948773 is 37784940482.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27179808769 + 1225140004 = 164863^2 + 35002^2 .

It is a cyclic number.

It is not a de Polignac number, because 28404948773 - 2²⁰ = 28403900197 is a prime.

It is a super-2 number, since 2×28404948773² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28404948743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14202474386 + 14202474387.

It is an arithmetic number, because the mean of its divisors is an integer number (14202474387).

Almost surely, 2^28404948773 is an apocalyptic number.

It is an amenable number.

28404948773 is a deficient number, since it is larger than the sum of its proper divisors (1).

28404948773 is an equidigital number, since it uses as much as digits as its factorization.

28404948773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10838016, while the sum is 56.

The spelling of 28404948773 in words is "twenty-eight billion, four hundred four million, nine hundred forty-eight thousand, seven hundred seventy-three".