13689450 has 72 divisors (see below), whose sum is σ = 38083500. Its totient is φ = 3521280.

The previous prime is 13689433. The next prime is 13689461. The reversal of 13689450 is 5498631.

It can be written as a sum of positive squares in 6 ways, for example, as 8311689 + 5377761 = 2883^2 + 2319^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12526 + ... + 13574.

Almost surely, 2^13689450 is an apocalyptic number.

13689450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13689450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19041750).

13689450 is an abundant number, since it is smaller than the sum of its proper divisors (24394050).

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

13689450 is a wasteful number, since it uses less digits than its factorization.

13689450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 13689450 is about 3699.9256749292. The cubic root of 13689450 is about 239.2188142120.

The spelling of 13689450 in words is "thirteen million, six hundred eighty-nine thousand, four hundred fifty".