13939428 has 12 divisors (see below), whose sum is σ = 32525360. Its totient is φ = 4646472.

The previous prime is 13939411. The next prime is 13939463. The reversal of 13939428 is 82493931.

13939428 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

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, 580798 + ... + 580821.

Almost surely, 2^13939428 is an apocalyptic number.

It is an amenable number.

13939428 is an abundant number, since it is smaller than the sum of its proper divisors (18585932).

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

13939428 is a wasteful number, since it uses less digits than its factorization.

13939428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161626 (or 1161624 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 13939428 is about 3733.5543386966. The cubic root of 13939428 is about 240.6661354984. Note that the first 3 decimals are identical.

The spelling of 13939428 in words is "thirteen million, nine hundred thirty-nine thousand, four hundred twenty-eight".