387947338 has 4 divisors (see below), whose sum is σ = 581921010. Its totient is φ = 193973668.

The previous prime is 387947311. The next prime is 387947347. The reversal of 387947338 is 833749783.

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., 272019049 + 115928289 = 16493^2 + 10767^2 .

It is a super-2 number, since 2×387947338² = 301006274122572488, which contains 22 as substring.

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, 96986833 + ... + 96986836.

Almost surely, 2^387947338 is an apocalyptic number.

387947338 is a deficient number, since it is larger than the sum of its proper divisors (193973672).

387947338 is a wasteful number, since it uses less digits than its factorization.

387947338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193973671.

The product of its digits is 3048192, while the sum is 52.

The square root of 387947338 is about 19696.3788042371. The cubic root of 387947338 is about 729.3303034338.

The spelling of 387947338 in words is "three hundred eighty-seven million, nine hundred forty-seven thousand, three hundred thirty-eight".