1387866 has 32 divisors (see below), whose sum is σ = 2954880. Its totient is φ = 433664.

The previous prime is 1387849. The next prime is 1387871. The reversal of 1387866 is 6687831.

It is a Curzon number.

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 in 15 ways as a sum of consecutive naturals, for example, 12226 + ... + 12338.

It is an arithmetic number, because the mean of its divisors is an integer number (92340).

2^1387866 is an apocalyptic number.

1387866 is an abundant number, since it is smaller than the sum of its proper divisors (1567014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1387866 is a wasteful number, since it uses less digits than its factorization.

1387866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230.

The product of its digits is 48384, while the sum is 39.

The square root of 1387866 is about 1178.0772470428. The cubic root of 1387866 is about 111.5447613991.

The spelling of 1387866 in words is "one million, three hundred eighty-seven thousand, eight hundred sixty-six".