1563444 has 36 divisors (see below), whose sum is σ = 3993444. Its totient is φ = 515712.

The previous prime is 1563433. The next prime is 1563449. The reversal of 1563444 is 4443651.

It can be written as a sum of positive squares in 2 ways, for example, as 435600 + 1127844 = 660^2 + 1062^2 .

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

It is a super-2 number, since 2×1563444² = 4888714282272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4774 + ... + 5090.

It is an arithmetic number, because the mean of its divisors is an integer number (110929).

2^1563444 is an apocalyptic number.

It is an amenable number.

1563444 is an abundant number, since it is smaller than the sum of its proper divisors (2430000).

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

1563444 is a wasteful number, since it uses less digits than its factorization.

1563444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 459 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 1563444 is about 1250.3775429845. The cubic root of 1563444 is about 116.0630849883.

It can be divided in two parts, 156 and 3444, that added together give a square (3600 = 60²).

The spelling of 1563444 in words is "one million, five hundred sixty-three thousand, four hundred forty-four".