13722128 has 40 divisors (see below), whose sum is σ = 32176512. Its totient is φ = 5534208.

The previous prime is 13722103. The next prime is 13722143. The reversal of 13722128 is 82122731.

It is a junction number, because it is equal to n+sod(n) for n = 13722097 and 13722106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700 + ... + 5507.

Almost surely, 2^13722128 is an apocalyptic number.

It is an amenable number.

13722128 is an abundant number, since it is smaller than the sum of its proper divisors (18454384).

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

13722128 is a wasteful number, since it uses less digits than its factorization.

13722128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7239 (or 7233 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 13722128 is about 3704.3390773524. The cubic root of 13722128 is about 239.4090088637.

Adding to 13722128 its reverse (82122731), we get a palindrome (95844859).

The spelling of 13722128 in words is "thirteen million, seven hundred twenty-two thousand, one hundred twenty-eight".