388398394 has 4 divisors (see below), whose sum is σ = 582597594. Its totient is φ = 194199196.

The previous prime is 388398389. The next prime is 388398433. The reversal of 388398394 is 493893883.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 387105625 + 1292769 = 19675^2 + 1137^2 .

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 as a sum of consecutive naturals, namely, 97099597 + ... + 97099600.

Almost surely, 2^388398394 is an apocalyptic number.

388398394 is a deficient number, since it is larger than the sum of its proper divisors (194199200).

388398394 is a wasteful number, since it uses less digits than its factorization.

388398394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194199199.

The product of its digits is 4478976, while the sum is 55.

The square root of 388398394 is about 19707.8257045266. The cubic root of 388398394 is about 729.6128515746.

The spelling of 388398394 in words is "three hundred eighty-eight million, three hundred ninety-eight thousand, three hundred ninety-four".