1366404 has 48 divisors (see below), whose sum is σ = 3622080. Its totient is φ = 397440.

The previous prime is 1366397. The next prime is 1366427. The reversal of 1366404 is 4046631.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2734 + ... + 3194.

It is an arithmetic number, because the mean of its divisors is an integer number (75460).

2^1366404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1366404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811040).

1366404 is an abundant number, since it is smaller than the sum of its proper divisors (2255676).

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

1366404 is a wasteful number, since it uses less digits than its factorization.

1366404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1366404 is about 1168.9328466597. The cubic root of 1366404 is about 110.9667947102.

It can be divided in two parts, 1366 and 404, that added together give a triangular number (1770 = T₅₉).

The spelling of 1366404 in words is "one million, three hundred sixty-six thousand, four hundred four".