1163644 has 12 divisors (see below), whose sum is σ = 2044168. Its totient is φ = 579600.

The previous prime is 1163641. The next prime is 1163651. The reversal of 1163644 is 4463611.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163641) 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, 1339 + ... + 2029.

2^1163644 is an apocalyptic number.

It is an amenable number.

1163644 is a deficient number, since it is larger than the sum of its proper divisors (880524).

1163644 is a wasteful number, since it uses less digits than its factorization.

1163644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1114 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 1163644 is about 1078.7233194847. The cubic root of 1163644 is about 105.1816658571.

The spelling of 1163644 in words is "one million, one hundred sixty-three thousand, six hundred forty-four".