388740307 has 2 divisors, whose sum is σ = 388740308. Its totient is φ = 388740306.

The previous prime is 388740301. The next prime is 388740329. The reversal of 388740307 is 703047883.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 388740307 - 2³ = 388740299 is a prime.

It is a super-2 number, since 2×388740307² = 302238052572908498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 388740307.

It is not a weakly prime, because it can be changed into another prime (388740301) 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 as a sum of consecutive naturals, namely, 194370153 + 194370154.

It is an arithmetic number, because the mean of its divisors is an integer number (194370154).

Almost surely, 2^388740307 is an apocalyptic number.

388740307 is a deficient number, since it is larger than the sum of its proper divisors (1).

388740307 is an equidigital number, since it uses as much as digits as its factorization.

388740307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 388740307 is about 19716.4983452945. The cubic root of 388740307 is about 729.8268852028.

The spelling of 388740307 in words is "three hundred eighty-eight million, seven hundred forty thousand, three hundred seven".