1368644 has 12 divisors (see below), whose sum is σ = 2403324. Its totient is φ = 681984.

The previous prime is 1368643. The next prime is 1368659. The reversal of 1368644 is 4468631.

It can be written as a sum of positive squares in 2 ways, for example, as 1183744 + 184900 = 1088^2 + 430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1368644.

It is not an unprimeable number, because it can be changed into a prime (1368643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2012 + ... + 2604.

It is an arithmetic number, because the mean of its divisors is an integer number (200277).

2^1368644 is an apocalyptic number.

It is an amenable number.

1368644 is a deficient number, since it is larger than the sum of its proper divisors (1034680).

1368644 is a wasteful number, since it uses less digits than its factorization.

1368644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1172 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 1368644 is about 1169.8905931753. The cubic root of 1368644 is about 111.0273990205.

The spelling of 1368644 in words is "one million, three hundred sixty-eight thousand, six hundred forty-four".