388149668 has 6 divisors (see below), whose sum is σ = 679261926. Its totient is φ = 194074832.

The previous prime is 388149637. The next prime is 388149677. The reversal of 388149668 is 866941883.

It can be written as a sum of positive squares in only one way, i.e., 386987584 + 1162084 = 19672^2 + 1078^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48518705 + ... + 48518712.

It is an arithmetic number, because the mean of its divisors is an integer number (113210321).

Almost surely, 2^388149668 is an apocalyptic number.

It is an amenable number.

388149668 is a deficient number, since it is larger than the sum of its proper divisors (291112258).

388149668 is a wasteful number, since it uses less digits than its factorization.

388149668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97037421 (or 97037419 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 53.

The square root of 388149668 is about 19701.5143580386. The cubic root of 388149668 is about 729.4570730058.

The spelling of 388149668 in words is "three hundred eighty-eight million, one hundred forty-nine thousand, six hundred sixty-eight".