13938428 has 12 divisors (see below), whose sum is σ = 27876912. Its totient is φ = 5973600.

The previous prime is 13938409. The next prime is 13938451. The reversal of 13938428 is 82483931.

13938428 is an admirable number.

It is a super-2 number, since 2×13938428² = 388559550222368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13938391 and 13938400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248873 + ... + 248928.

It is an arithmetic number, because the mean of its divisors is an integer number (2323076).

Almost surely, 2^13938428 is an apocalyptic number.

It is an amenable number.

13938428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13938428 is a wasteful number, since it uses less digits than its factorization.

13938428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497812 (or 497810 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 13938428 is about 3733.4204156510. The cubic root of 13938428 is about 240.6603803151.

The spelling of 13938428 in words is "thirteen million, nine hundred thirty-eight thousand, four hundred twenty-eight".