307443140 has 12 divisors (see below), whose sum is σ = 645630636. Its totient is φ = 122977248.

The previous prime is 307443107. The next prime is 307443167. The reversal of 307443140 is 41344703.

It can be written as a sum of positive squares in 2 ways, for example, as 171767236 + 135675904 = 13106^2 + 11648^2 .

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 3 ways as a sum of consecutive naturals, for example, 7686059 + ... + 7686098.

It is an arithmetic number, because the mean of its divisors is an integer number (53802553).

Almost surely, 2^307443140 is an apocalyptic number.

It is an amenable number.

307443140 is an abundant number, since it is smaller than the sum of its proper divisors (338187496).

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

307443140 is a wasteful number, since it uses less digits than its factorization.

307443140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15372166 (or 15372164 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 307443140 is about 17534.0565757043. The cubic root of 307443140 is about 674.9240993760.

Adding to 307443140 its reverse (41344703), we get a palindrome (348787843).

The spelling of 307443140 in words is "three hundred seven million, four hundred forty-three thousand, one hundred forty".