13273664 has 14 divisors (see below), whose sum is σ = 26340054. Its totient is φ = 6636800.

The previous prime is 13273657. The next prime is 13273669. The reversal of 13273664 is 46637231.

It can be written as a sum of positive squares in only one way, i.e., 9241600 + 4032064 = 3040^2 + 2008^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 13273664.

It is not an unprimeable number, because it can be changed into a prime (13273669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103637 + ... + 103764.

Almost surely, 2^13273664 is an apocalyptic number.

It is an amenable number.

13273664 is a deficient number, since it is larger than the sum of its proper divisors (13066390).

13273664 is an equidigital number, since it uses as much as digits as its factorization.

13273664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207413 (or 207403 counting only the distinct ones).

The product of its digits is 18144, while the sum is 32.

The square root of 13273664 is about 3643.3039950023. The cubic root of 13273664 is about 236.7719622270.

The spelling of 13273664 in words is "thirteen million, two hundred seventy-three thousand, six hundred sixty-four".