13644045 has 40 divisors (see below), whose sum is σ = 24916320. Its totient is φ = 7140960.

The previous prime is 13644041. The next prime is 13644073. The reversal of 13644045 is 54044631.

13644045 is a `hidden beast` number, since 13 + 644 + 0 + 4 + 5 = 666.

It is not a de Polignac number, because 13644045 - 2² = 13644041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13644041) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23610 + ... + 24180.

It is an arithmetic number, because the mean of its divisors is an integer number (622908).

Almost surely, 2^13644045 is an apocalyptic number.

13644045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13644045 is a deficient number, since it is larger than the sum of its proper divisors (11272275).

13644045 is an equidigital number, since it uses as much as digits as its factorization.

13644045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 13644045 is about 3693.7846445076. The cubic root of 13644045 is about 238.9540419209.

Adding to 13644045 its reverse (54044631), we get a palindrome (67688676).

The spelling of 13644045 in words is "thirteen million, six hundred forty-four thousand, forty-five".