308908045 has 4 divisors (see below), whose sum is σ = 370689660. Its totient is φ = 247126432.

The previous prime is 308908031. The next prime is 308908081. The reversal of 308908045 is 540809803.

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 226261764 + 82646281 = 15042^2 + 9091^2 .

It is a cyclic number.

It is not a de Polignac number, because 308908045 - 2⁵ = 308908013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 308907995 and 308908013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30890800 + ... + 30890809.

It is an arithmetic number, because the mean of its divisors is an integer number (92672415).

Almost surely, 2^308908045 is an apocalyptic number.

It is an amenable number.

308908045 is a deficient number, since it is larger than the sum of its proper divisors (61781615).

308908045 is an equidigital number, since it uses as much as digits as its factorization.

308908045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61781614.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 308908045 is about 17575.7800680368. The cubic root of 308908045 is about 675.9943607071.

The spelling of 308908045 in words is "three hundred eight million, nine hundred eight thousand, forty-five".