1396404 has 36 divisors (see below), whose sum is σ = 3581760. Its totient is φ = 458640.

The previous prime is 1396393. The next prime is 1396411. The reversal of 1396404 is 4046931.

1396404 is a `hidden beast` number, since 13 + 9 + 640 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 in 11 ways as a sum of consecutive naturals, for example, 2599 + ... + 3089.

2^1396404 is an apocalyptic number.

1396404 is the 632-nd nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1396404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1790880).

1396404 is an abundant number, since it is smaller than the sum of its proper divisors (2185356).

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

1396404 is a wasteful number, since it uses less digits than its factorization.

1396404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1396404 is about 1181.6953922225. The cubic root of 1396404 is about 111.7730310023.

The spelling of 1396404 in words is "one million, three hundred ninety-six thousand, four hundred four".