1365644 has 48 divisors (see below), whose sum is σ = 3064320. Its totient is φ = 518400.

The previous prime is 1365583. The next prime is 1365659. The reversal of 1365644 is 4465631.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8969 + ... + 9119.

It is an arithmetic number, because the mean of its divisors is an integer number (63840).

2^1365644 is an apocalyptic number.

1365644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1365644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1532160).

1365644 is an abundant number, since it is smaller than the sum of its proper divisors (1698676).

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

1365644 is a wasteful number, since it uses less digits than its factorization.

1365644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 196 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 1365644 is about 1168.6077186122. The cubic root of 1365644 is about 110.9462174860.

The spelling of 1365644 in words is "one million, three hundred sixty-five thousand, six hundred forty-four".