13091644 has 12 divisors (see below), whose sum is σ = 23700600. Its totient is φ = 6320048.

The previous prime is 13091629. The next prime is 13091677. The reversal of 13091644 is 44619031.

It is a super-2 number, since 2×13091644² = 342782285245472, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56314 + ... + 56545.

It is an arithmetic number, because the mean of its divisors is an integer number (1975050).

Almost surely, 2^13091644 is an apocalyptic number.

It is an amenable number.

13091644 is a deficient number, since it is larger than the sum of its proper divisors (10608956).

13091644 is a wasteful number, since it uses less digits than its factorization.

13091644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112892 (or 112890 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13091644 is about 3618.2376925791. The cubic root of 13091644 is about 235.6847029559.

The spelling of 13091644 in words is "thirteen million, ninety-one thousand, six hundred forty-four".