306448649 has 4 divisors (see below), whose sum is σ = 330021636. Its totient is φ = 282875664.

The previous prime is 306448643. The next prime is 306448651. The reversal of 306448649 is 946844603.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65205625 + 241243024 = 8075^2 + 15532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-306448649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (306448643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11786474 + ... + 11786499.

It is an arithmetic number, because the mean of its divisors is an integer number (82505409).

Almost surely, 2^306448649 is an apocalyptic number.

It is an amenable number.

306448649 is a deficient number, since it is larger than the sum of its proper divisors (23572987).

306448649 is a wasteful number, since it uses less digits than its factorization.

306448649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23572986.

The product of its (nonzero) digits is 497664, while the sum is 44.

The square root of 306448649 is about 17505.6747656296. The cubic root of 306448649 is about 674.1955842150.

It can be divided in two parts, 30644 and 8649, that added together give a palindrome (39293).

The spelling of 306448649 in words is "three hundred six million, four hundred forty-eight thousand, six hundred forty-nine".