1406784 has 56 divisors (see below), whose sum is σ = 3950208. Its totient is φ = 440320.

The previous prime is 1406773. The next prime is 1406789. The reversal of 1406784 is 4876041.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3049 + ... + 3479.

2^1406784 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 1406784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1975104).

1406784 is an abundant number, since it is smaller than the sum of its proper divisors (2543424).

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

1406784 is a wasteful number, since it uses less digits than its factorization.

1406784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 1406784 is about 1186.0792553620. The cubic root of 1406784 is about 112.0492980256.

The spelling of 1406784 in words is "one million, four hundred six thousand, seven hundred eighty-four".