1563728 has 20 divisors (see below), whose sum is σ = 3208500. Its totient is φ = 735744.

The previous prime is 1563707. The next prime is 1563739. The reversal of 1563728 is 8273651.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 506944 + 1056784 = 712^2 + 1028^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1563694 and 1563703.

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 3 ways as a sum of consecutive naturals, for example, 2603 + ... + 3146.

It is an arithmetic number, because the mean of its divisors is an integer number (160425).

2^1563728 is an apocalyptic number.

It is an amenable number.

1563728 is an abundant number, since it is smaller than the sum of its proper divisors (1644772).

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

1563728 is a wasteful number, since it uses less digits than its factorization.

1563728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5774 (or 5768 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 1563728 is about 1250.4911035269. The cubic root of 1563728 is about 116.0701121925.

The spelling of 1563728 in words is "one million, five hundred sixty-three thousand, seven hundred twenty-eight".