388942357 has 4 divisors (see below), whose sum is σ = 389633760. Its totient is φ = 388250956.

The previous prime is 388942349. The next prime is 388942361. The reversal of 388942357 is 753249883.

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 388942357 - 2³ = 388942349 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 388942357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388942457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344857 + ... + 345982.

It is an arithmetic number, because the mean of its divisors is an integer number (97408440).

Almost surely, 2^388942357 is an apocalyptic number.

It is an amenable number.

388942357 is a deficient number, since it is larger than the sum of its proper divisors (691403).

388942357 is an equidigital number, since it uses as much as digits as its factorization.

388942357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691402.

The product of its digits is 1451520, while the sum is 49.

The square root of 388942357 is about 19721.6215611192. The cubic root of 388942357 is about 729.9533072030.

The spelling of 388942357 in words is "three hundred eighty-eight million, nine hundred forty-two thousand, three hundred fifty-seven".