388408313 has 4 divisors (see below), whose sum is σ = 394205520. Its totient is φ = 382611108.

The previous prime is 388408301. The next prime is 388408357. The reversal of 388408313 is 313804883.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 388408313 - 2⁴ = 388408297 is a prime.

It is a super-2 number, since 2×388408313² = 301722035215011938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388408213) 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 3 ways as a sum of consecutive naturals, for example, 2898503 + ... + 2898636.

It is an arithmetic number, because the mean of its divisors is an integer number (98551380).

Almost surely, 2^388408313 is an apocalyptic number.

It is an amenable number.

388408313 is a deficient number, since it is larger than the sum of its proper divisors (5797207).

388408313 is an equidigital number, since it uses as much as digits as its factorization.

388408313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5797206.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 388408313 is about 19708.0773542221. The cubic root of 388408313 is about 729.6190625239.

The spelling of 388408313 in words is "three hundred eighty-eight million, four hundred eight thousand, three hundred thirteen".