13720068 has 36 divisors (see below), whose sum is σ = 35047740. Its totient is φ = 4525056.

The previous prime is 13720061. The next prime is 13720127. The reversal of 13720068 is 86002731.

It can be written as a sum of positive squares in 2 ways, for example, as 3873024 + 9847044 = 1968^2 + 3138^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (13720061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1528 + ... + 5456.

Almost surely, 2^13720068 is an apocalyptic number.

13720068 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13720068 is an abundant number, since it is smaller than the sum of its proper divisors (21327672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13720068 is a wasteful number, since it uses less digits than its factorization.

13720068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4036 (or 4031 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 13720068 is about 3704.0610146163. The cubic root of 13720068 is about 239.3970280387.

Adding to 13720068 its reverse (86002731), we get a palindrome (99722799).

The spelling of 13720068 in words is "thirteen million, seven hundred twenty thousand, sixty-eight".