1018644 has 24 divisors (see below), whose sum is σ = 2593248. Its totient is φ = 308640.

The previous prime is 1018643. The next prime is 1018649. The reversal of 1018644 is 4468101.

1018644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018643) 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, 3727 + ... + 3990.

It is an arithmetic number, because the mean of its divisors is an integer number (108052).

2^1018644 is an apocalyptic number.

It is an amenable number.

1018644 is an abundant number, since it is smaller than the sum of its proper divisors (1574604).

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

1018644 is a wasteful number, since it uses less digits than its factorization.

1018644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7735 (or 7733 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1018644 is about 1009.2789505385. The cubic root of 1018644 is about 100.6176439719.

The spelling of 1018644 in words is "one million, eighteen thousand, six hundred forty-four".