1005636 has 24 divisors (see below), whose sum is σ = 2364544. Its totient is φ = 332640.

The previous prime is 1005619. The next prime is 1005637. The reversal of 1005636 is 6365001.

It is a super-2 number, since 2×1005636² = 2022607528992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1005637) 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, 1941 + ... + 2403.

2^1005636 is an apocalyptic number.

It is an amenable number.

1005636 is an abundant number, since it is smaller than the sum of its proper divisors (1358908).

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

1005636 is a wasteful number, since it uses less digits than its factorization.

1005636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1005636 is about 1002.8140405878. The cubic root of 1005636 is about 100.1875148288.

The spelling of 1005636 in words is "one million, five thousand, six hundred thirty-six".