13749428 has 24 divisors (see below), whose sum is σ = 29999424. Its totient is φ = 5356800.

The previous prime is 13749403. The next prime is 13749443. The reversal of 13749428 is 82494731.

13749428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13749391 and 13749400.

It is a congruent number.

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, 22013 + ... + 22628.

It is an arithmetic number, because the mean of its divisors is an integer number (1249976).

Almost surely, 2^13749428 is an apocalyptic number.

It is an amenable number.

13749428 is an abundant number, since it is smaller than the sum of its proper divisors (16249996).

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

13749428 is a wasteful number, since it uses less digits than its factorization.

13749428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44663 (or 44661 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 13749428 is about 3708.0221142814. The cubic root of 13749428 is about 239.5676707560.

The spelling of 13749428 in words is "thirteen million, seven hundred forty-nine thousand, four hundred twenty-eight".