13688722 has 8 divisors (see below), whose sum is σ = 20588400. Its totient is φ = 6825924.

The previous prime is 13688699. The next prime is 13688761. The reversal of 13688722 is 22788631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13688722² = 374762219986568, which contains 22 as substring.

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, 8272 + ... + 9787.

It is an arithmetic number, because the mean of its divisors is an integer number (2573550).

Almost surely, 2^13688722 is an apocalyptic number.

13688722 is a deficient number, since it is larger than the sum of its proper divisors (6899678).

13688722 is a wasteful number, since it uses less digits than its factorization.

13688722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18440.

The product of its digits is 32256, while the sum is 37.

The square root of 13688722 is about 3699.8272932665. The cubic root of 13688722 is about 239.2145736135.

Subtracting 13688722 from its reverse (22788631), we obtain a palindrome (9099909).

The spelling of 13688722 in words is "thirteen million, six hundred eighty-eight thousand, seven hundred twenty-two".