13889530 has 8 divisors (see below), whose sum is σ = 25001172. Its totient is φ = 5555808.

The previous prime is 13889509. The next prime is 13889531. The reversal of 13889530 is 3598831.

It can be written as a sum of positive squares in 2 ways, for example, as 13816089 + 73441 = 3717^2 + 271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13889530.

It is not an unprimeable number, because it can be changed into a prime (13889531) 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, 694467 + ... + 694486.

Almost surely, 2^13889530 is an apocalyptic number.

13889530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13889530 is a deficient number, since it is larger than the sum of its proper divisors (11111642).

13889530 is a wasteful number, since it uses less digits than its factorization.

13889530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388960.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 13889530 is about 3726.8659755886. The cubic root of 13889530 is about 240.3786268966.

Adding to 13889530 its product of nonzero digits (25920), we get a triangular number (13915450 = T₅₂₇₅).

The spelling of 13889530 in words is "thirteen million, eight hundred eighty-nine thousand, five hundred thirty".