388720017 has 12 divisors (see below), whose sum is σ = 641696640. Its totient is φ = 222125688.

The previous prime is 388719971. The next prime is 388720019. The reversal of 388720017 is 710027883.

It is not a de Polignac number, because 388720017 - 2⁷ = 388719889 is a prime.

It is a super-2 number, since 2×388720017² = 302206503232960578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388720019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3085017 + ... + 3085142.

It is an arithmetic number, because the mean of its divisors is an integer number (53474720).

Almost surely, 2^388720017 is an apocalyptic number.

It is an amenable number.

388720017 is a deficient number, since it is larger than the sum of its proper divisors (252976623).

388720017 is a wasteful number, since it uses less digits than its factorization.

388720017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6170172 (or 6170169 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 388720017 is about 19715.9837948807. The cubic root of 388720017 is about 729.8141873984.

The spelling of 388720017 in words is "three hundred eighty-eight million, seven hundred twenty thousand, seventeen".