306442040 has 32 divisors (see below), whose sum is σ = 700803360. Its totient is φ = 120566400.

The previous prime is 306442033. The next prime is 306442049. The reversal of 306442040 is 40244603.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 306441997 and 306442015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306442049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60356 + ... + 65235.

It is an arithmetic number, because the mean of its divisors is an integer number (21900105).

Almost surely, 2^306442040 is an apocalyptic number.

It is an amenable number.

306442040 is an abundant number, since it is smaller than the sum of its proper divisors (394361320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

306442040 is a wasteful number, since it uses less digits than its factorization.

306442040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125663 (or 125659 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 306442040 is about 17505.4859972524. The cubic root of 306442040 is about 674.1907375187.

Adding to 306442040 its reverse (40244603), we get a palindrome (346686643).

The spelling of 306442040 in words is "three hundred six million, four hundred forty-two thousand, forty".