13491644 has 6 divisors (see below), whose sum is σ = 23610384. Its totient is φ = 6745820.

The previous prime is 13491629. The next prime is 13491677. The reversal of 13491644 is 44619431.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13491644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1686452 + ... + 1686459.

It is an arithmetic number, because the mean of its divisors is an integer number (3935064).

Almost surely, 2^13491644 is an apocalyptic number.

It is an amenable number.

13491644 is a deficient number, since it is larger than the sum of its proper divisors (10118740).

13491644 is a wasteful number, since it uses less digits than its factorization.

13491644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372915 (or 3372913 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 13491644 is about 3673.0973305917. The cubic root of 13491644 is about 238.0610205329.

The spelling of 13491644 in words is "thirteen million, four hundred ninety-one thousand, six hundred forty-four".