306140244 has 12 divisors (see below), whose sum is σ = 714327264. Its totient is φ = 102046744.

The previous prime is 306140201. The next prime is 306140249. The reversal of 306140244 is 442041603.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306140249) 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, 12755832 + ... + 12755855.

It is an arithmetic number, because the mean of its divisors is an integer number (59527272).

Almost surely, 2^306140244 is an apocalyptic number.

It is an amenable number.

306140244 is an abundant number, since it is smaller than the sum of its proper divisors (408187020).

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

306140244 is a wasteful number, since it uses less digits than its factorization.

306140244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25511694 (or 25511692 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 306140244 is about 17496.8638332702. The cubic root of 306140244 is about 673.9693417654.

Adding to 306140244 its reverse (442041603), we get a palindrome (748181847).

The spelling of 306140244 in words is "three hundred six million, one hundred forty thousand, two hundred forty-four".