13646428 has 12 divisors (see below), whose sum is σ = 23939440. Its totient is φ = 6806592.

The previous prime is 13646419. The next prime is 13646447. The reversal of 13646428 is 82464631.

It is a junction number, because it is equal to n+sod(n) for n = 13646393 and 13646402.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2208 + ... + 5671.

Almost surely, 2^13646428 is an apocalyptic number.

It is an amenable number.

13646428 is a deficient number, since it is larger than the sum of its proper divisors (10293012).

13646428 is a wasteful number, since it uses less digits than its factorization.

13646428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8316 (or 8314 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 13646428 is about 3694.1071993108. The cubic root of 13646428 is about 238.9679526132.

It can be divided in two parts, 136 and 46428, that added together give a palindrome (46564).

The spelling of 13646428 in words is "thirteen million, six hundred forty-six thousand, four hundred twenty-eight".