13938828 has 24 divisors (see below), whose sum is σ = 33938688. Its totient is φ = 4444176.

The previous prime is 13938823. The next prime is 13938857. The reversal of 13938828 is 82883931.

It is a self number, because there is not a number n which added to its sum of digits gives 13938828.

It is not an unprimeable number, because it can be changed into a prime (13938823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24976 + ... + 25527.

It is an arithmetic number, because the mean of its divisors is an integer number (1414112).

Almost surely, 2^13938828 is an apocalyptic number.

It is an amenable number.

13938828 is an abundant number, since it is smaller than the sum of its proper divisors (19999860).

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

13938828 is a wasteful number, since it uses less digits than its factorization.

13938828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50533 (or 50531 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 13938828 is about 3733.4739854457. The cubic root of 13938828 is about 240.6626824215.

The spelling of 13938828 in words is "thirteen million, nine hundred thirty-eight thousand, eight hundred twenty-eight".