7280355249 has 10 divisors (see below), whose sum is σ = 10875592530. Its totient is φ = 4853570112.

The previous prime is 7280355211. The next prime is 7280355289. The reversal of 7280355249 is 9425530827.

It can be written as a sum of positive squares in only one way, i.e., 7230441024 + 49914225 = 85032^2 + 7065^2 .

It is not a de Polignac number, because 7280355249 - 2¹³ = 7280347057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7280355289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 44940384 + ... + 44940545.

It is an arithmetic number, because the mean of its divisors is an integer number (1087559253).

Almost surely, 2^7280355249 is an apocalyptic number.

It is an amenable number.

7280355249 is a deficient number, since it is larger than the sum of its proper divisors (3595237281).

7280355249 is an equidigital number, since it uses as much as digits as its factorization.

7280355249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89880941 (or 89880932 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 7280355249 is about 85324.9977966598. The cubic root of 7280355249 is about 1938.1357413381.

The spelling of 7280355249 in words is "seven billion, two hundred eighty million, three hundred fifty-five thousand, two hundred forty-nine".