13678428 has 12 divisors (see below), whose sum is σ = 31916360. Its totient is φ = 4559472.

The previous prime is 13678417. The next prime is 13678433. The reversal of 13678428 is 82487631.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 569923 + ... + 569946.

Almost surely, 2^13678428 is an apocalyptic number.

It is an amenable number.

13678428 is an abundant number, since it is smaller than the sum of its proper divisors (18237932).

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

13678428 is a wasteful number, since it uses less digits than its factorization.

13678428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139876 (or 1139874 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 13678428 is about 3698.4358856143. The cubic root of 13678428 is about 239.1545949842.

The spelling of 13678428 in words is "thirteen million, six hundred seventy-eight thousand, four hundred twenty-eight".