13889420 has 12 divisors (see below), whose sum is σ = 29167824. Its totient is φ = 5555760.

The previous prime is 13889417. The next prime is 13889423. The reversal of 13889420 is 2498831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13889417) and next prime (13889423).

It is not an unprimeable number, because it can be changed into a prime (13889423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347216 + ... + 347255.

It is an arithmetic number, because the mean of its divisors is an integer number (2430652).

Almost surely, 2^13889420 is an apocalyptic number.

13889420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13889420 is an abundant number, since it is smaller than the sum of its proper divisors (15278404).

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

13889420 is a wasteful number, since it uses less digits than its factorization.

13889420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694480 (or 694478 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 13889420 is about 3726.8512178513. The cubic root of 13889420 is about 240.3779923246.

The spelling of 13889420 in words is "thirteen million, eight hundred eighty-nine thousand, four hundred twenty".