1394784 has 72 divisors (see below), whose sum is σ = 4127760. Its totient is φ = 446208.

The previous prime is 1394777. The next prime is 1394821. The reversal of 1394784 is 4874931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8269 + ... + 8435.

It is an arithmetic number, because the mean of its divisors is an integer number (57330).

2^1394784 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 1394784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2063880).

1394784 is an abundant number, since it is smaller than the sum of its proper divisors (2732976).

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

1394784 is a wasteful number, since it uses less digits than its factorization.

1394784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 201 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1394784 is about 1181.0097374704. The cubic root of 1394784 is about 111.7297907992.

The spelling of 1394784 in words is "one million, three hundred ninety-four thousand, seven hundred eighty-four".