4012644 has 12 divisors (see below), whose sum is σ = 9362864. Its totient is φ = 1337544.

The previous prime is 4012639. The next prime is 4012669. The reversal of 4012644 is 4462104.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×4012644² = 32202623741472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4012644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167182 + ... + 167205.

Almost surely, 2^4012644 is an apocalyptic number.

It is an amenable number.

4012644 is an abundant number, since it is smaller than the sum of its proper divisors (5350220).

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

4012644 is a wasteful number, since it uses less digits than its factorization.

4012644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334394 (or 334392 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4012644 is about 2003.1585059600. The cubic root of 4012644 is about 158.9071884278.

Adding to 4012644 its reverse (4462104), we get a palindrome (8474748).

It can be divided in two parts, 4012 and 644, that added together give a triangular number (4656 = T₉₆).

The spelling of 4012644 in words is "four million, twelve thousand, six hundred forty-four".