1366388 has 6 divisors (see below), whose sum is σ = 2391186. Its totient is φ = 683192.

The previous prime is 1366367. The next prime is 1366397. The reversal of 1366388 is 8836631.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1162084 + 204304 = 1078^2 + 452^2 .

It is a congruent 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 as a sum of consecutive naturals, namely, 170795 + ... + 170802.

It is an arithmetic number, because the mean of its divisors is an integer number (398531).

2^1366388 is an apocalyptic number.

It is an amenable number.

1366388 is a deficient number, since it is larger than the sum of its proper divisors (1024798).

1366388 is a wasteful number, since it uses less digits than its factorization.

1366388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341601 (or 341599 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 1366388 is about 1168.9260027906. The cubic root of 1366388 is about 110.9663615841.

The spelling of 1366388 in words is "one million, three hundred sixty-six thousand, three hundred eighty-eight".