387666442 has 4 divisors (see below), whose sum is σ = 581499666. Its totient is φ = 193833220.

The previous prime is 387666437. The next prime is 387666451. The reversal of 387666442 is 244666783.

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., 265983481 + 121682961 = 16309^2 + 11031^2 .

It is a junction number, because it is equal to n+sod(n) for n = 387666392 and 387666401.

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, 96916609 + ... + 96916612.

Almost surely, 2^387666442 is an apocalyptic number.

387666442 is a deficient number, since it is larger than the sum of its proper divisors (193833224).

387666442 is a wasteful number, since it uses less digits than its factorization.

387666442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193833223.

The product of its digits is 1161216, while the sum is 46.

The square root of 387666442 is about 19689.2468621834. The cubic root of 387666442 is about 729.1542353531.

The spelling of 387666442 in words is "three hundred eighty-seven million, six hundred sixty-six thousand, four hundred forty-two".