305040242 has 16 divisors (see below), whose sum is σ = 493789632. Its totient is φ = 140492880.

The previous prime is 305040233. The next prime is 305040257. The reversal of 305040242 is 242040503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617 + ... + 24707.

It is an arithmetic number, because the mean of its divisors is an integer number (30861852).

Almost surely, 2^305040242 is an apocalyptic number.

305040242 is a deficient number, since it is larger than the sum of its proper divisors (188749390).

305040242 is a wasteful number, since it uses less digits than its factorization.

305040242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24593.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 305040242 is about 17465.4012836808. The cubic root of 305040242 is about 673.1611529709.

Adding to 305040242 its reverse (242040503), we get a palindrome (547080745).

The spelling of 305040242 in words is "three hundred five million, forty thousand, two hundred forty-two".