10643644 has 18 divisors (see below), whose sum is σ = 20474552. Its totient is φ = 4837800.

The previous prime is 10643639. The next prime is 10643653. The reversal of 10643644 is 44634601.

It is a happy number.

It is a super-2 number, since 2×10643644² = 226574315197472, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 10512 + ... + 11479.

Almost surely, 2^10643644 is an apocalyptic number.

It is an amenable number.

10643644 is a deficient number, since it is larger than the sum of its proper divisors (9830908).

10643644 is a wasteful number, since it uses less digits than its factorization.

10643644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22017 (or 22004 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 10643644 is about 3262.4598081816. The cubic root of 10643644 is about 219.9699959082.

It can be divided in two parts, 106 and 43644, that multiplied together give a palindrome (4626264).

The spelling of 10643644 in words is "ten million, six hundred forty-three thousand, six hundred forty-four".