307240812 has 18 divisors (see below), whose sum is σ = 776636588. Its totient is φ = 102413592.

The previous prime is 307240799. The next prime is 307240853. The reversal of 307240812 is 218042703.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4267198 + ... + 4267269.

Almost surely, 2^307240812 is an apocalyptic number.

It is an amenable number.

307240812 is an abundant number, since it is smaller than the sum of its proper divisors (469395776).

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

307240812 is a wasteful number, since it uses less digits than its factorization.

307240812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8534477 (or 8534472 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 307240812 is about 17528.2860542610. The cubic root of 307240812 is about 674.7760112776.

The spelling of 307240812 in words is "three hundred seven million, two hundred forty thousand, eight hundred twelve".