13642228 has 24 divisors (see below), whose sum is σ = 26611200. Its totient is φ = 6081408.

The previous prime is 13642219. The next prime is 13642229. The reversal of 13642228 is 82224631.

It is a super-2 number, since 2×13642228² = 372220769607968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13642196 and 13642205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13642229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3988 + ... + 6571.

It is an arithmetic number, because the mean of its divisors is an integer number (1108800).

Almost surely, 2^13642228 is an apocalyptic number.

It is an amenable number.

13642228 is a deficient number, since it is larger than the sum of its proper divisors (12968972).

13642228 is a wasteful number, since it uses less digits than its factorization.

13642228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10599 (or 10597 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 13642228 is about 3693.5386826186. The cubic root of 13642228 is about 238.9434341486.

Adding to 13642228 its reverse (82224631), we get a palindrome (95866859).

The spelling of 13642228 in words is "thirteen million, six hundred forty-two thousand, two hundred twenty-eight".