308117242 has 8 divisors (see below), whose sum is σ = 472009536. Its totient is φ = 150780732.

The previous prime is 308117237. The next prime is 308117263. The reversal of 308117242 is 242711803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 308117242.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1638828 + ... + 1639015.

It is an arithmetic number, because the mean of its divisors is an integer number (59001192).

Almost surely, 2^308117242 is an apocalyptic number.

308117242 is a deficient number, since it is larger than the sum of its proper divisors (163892294).

308117242 is a wasteful number, since it uses less digits than its factorization.

308117242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277892.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 308117242 is about 17553.2686984504. The cubic root of 308117242 is about 675.4170204062.

The spelling of 308117242 in words is "three hundred eight million, one hundred seventeen thousand, two hundred forty-two".