13640168 has 8 divisors (see below), whose sum is σ = 25575330. Its totient is φ = 6820080.

The previous prime is 13640153. The next prime is 13640177. The reversal of 13640168 is 86104631.

It can be written as a sum of positive squares in only one way, i.e., 13118884 + 521284 = 3622^2 + 722^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 13640168.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852503 + ... + 852518.

Almost surely, 2^13640168 is an apocalyptic number.

It is an amenable number.

13640168 is a deficient number, since it is larger than the sum of its proper divisors (11935162).

13640168 is a wasteful number, since it uses less digits than its factorization.

13640168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705027 (or 1705023 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 13640168 is about 3693.2598067290. The cubic root of 13640168 is about 238.9314065860.

Adding to 13640168 its reverse (86104631), we get a palindrome (99744799).

It can be divided in two parts, 136 and 40168, that added together give a palindrome (40304).

The spelling of 13640168 in words is "thirteen million, six hundred forty thousand, one hundred sixty-eight".