306140540 has 24 divisors (see below), whose sum is σ = 676732560. Its totient is φ = 116011008.

The previous prime is 306140537. The next prime is 306140543. The reversal of 306140540 is 45041603.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (306140537) and next prime (306140543).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306140543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402437 + ... + 403196.

It is an arithmetic number, because the mean of its divisors is an integer number (28197190).

Almost surely, 2^306140540 is an apocalyptic number.

It is an amenable number.

306140540 is an abundant number, since it is smaller than the sum of its proper divisors (370592020).

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

306140540 is a wasteful number, since it uses less digits than its factorization.

306140540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805661 (or 805659 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 306140540 is about 17496.8722919269. The cubic root of 306140540 is about 673.9695589805.

The spelling of 306140540 in words is "three hundred six million, one hundred forty thousand, five hundred forty".