308248249 has 9 divisors (see below), whose sum is σ = 313189101. Its totient is φ = 303384960.

The previous prime is 308248247. The next prime is 308248261. The reversal of 308248249 is 942842803.

The square root of 308248249 is 17557.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 137475625 + 170772624 = 11725^2 + 13068^2 .

It is not a de Polignac number, because 308248249 - 2¹ = 308248247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (308248247) 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 8 ways as a sum of consecutive naturals, for example, 1702939 + ... + 1703119.

It is an arithmetic number, because the mean of its divisors is an integer number (34798789).

Almost surely, 2^308248249 is an apocalyptic number.

308248249 is the 17557-th square number.

308248249 is the 8779-th centered octagonal number.

It is an amenable number.

308248249 is a deficient number, since it is larger than the sum of its proper divisors (4940852).

308248249 is an frugal number, since it uses more digits than its factorization.

308248249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The cubic root of 308248249 is about 675.5127326955.

The spelling of 308248249 in words is "three hundred eight million, two hundred forty-eight thousand, two hundred forty-nine".