387986 has 4 divisors (see below), whose sum is σ = 581982. Its totient is φ = 193992.

The previous prime is 387977. The next prime is 388009. The reversal of 387986 is 689783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689783 = 383 ⋅1801.

It can be written as a sum of positive squares in only one way, i.e., 286225 + 101761 = 535^2 + 319^2 .

It is a plaindrome in base 11.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96995 + ... + 96998.

2³⁸⁷⁹⁸⁶ is an apocalyptic number.

387986 is a deficient number, since it is larger than the sum of its proper divisors (193996).

387986 is a wasteful number, since it uses less digits than its factorization.

387986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193995.

The product of its digits is 72576, while the sum is 41.

The square root of 387986 is about 622.8852221718. The cubic root of 387986 is about 72.9354530460.

The spelling of 387986 in words is "three hundred eighty-seven thousand, nine hundred eighty-six".