388557742 has 8 divisors (see below), whose sum is σ = 595237536. Its totient is φ = 190145232.

The previous prime is 388557737. The next prime is 388557773. The reversal of 388557742 is 247755883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 2066703 + ... + 2066890.

It is an arithmetic number, because the mean of its divisors is an integer number (74404692).

Almost surely, 2^388557742 is an apocalyptic number.

388557742 is a deficient number, since it is larger than the sum of its proper divisors (206679794).

388557742 is a wasteful number, since it uses less digits than its factorization.

388557742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133642.

The product of its digits is 1881600, while the sum is 49.

The square root of 388557742 is about 19711.8680494772. The cubic root of 388557742 is about 729.7126172228.

The spelling of 388557742 in words is "three hundred eighty-eight million, five hundred fifty-seven thousand, seven hundred forty-two".