13661288 has 16 divisors (see below), whose sum is σ = 26307780. Its totient is φ = 6645888.

The previous prime is 13661281. The next prime is 13661303. The reversal of 13661288 is 88216631.

It can be written as a sum of positive squares in 2 ways, for example, as 10640644 + 3020644 = 3262^2 + 1738^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13661281) 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, 22781 + ... + 23372.

Almost surely, 2^13661288 is an apocalyptic number.

It is an amenable number.

13661288 is a deficient number, since it is larger than the sum of its proper divisors (12646492).

13661288 is a wasteful number, since it uses less digits than its factorization.

13661288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46196 (or 46192 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 13661288 is about 3696.1179634855. The cubic root of 13661288 is about 239.0546609103.

The spelling of 13661288 in words is "thirteen million, six hundred sixty-one thousand, two hundred eighty-eight".