1063644 has 24 divisors (see below), whose sum is σ = 2502528. Its totient is φ = 351600.

The previous prime is 1063637. The next prime is 1063649. The reversal of 1063644 is 4463601.

It is a super-2 number, since 2×1063644² = 2262677117472, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1063649) 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, 1519 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (104272).

2^1063644 is an apocalyptic number.

It is an amenable number.

1063644 is an abundant number, since it is smaller than the sum of its proper divisors (1438884).

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

1063644 is a wasteful number, since it uses less digits than its factorization.

1063644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1063644 is about 1031.3311786230. The cubic root of 1063644 is about 102.0779872623.

The spelling of 1063644 in words is "one million, sixty-three thousand, six hundred forty-four".