13693540 has 72 divisors (see below), whose sum is σ = 34042680. Its totient is φ = 4612608.

The previous prime is 13693523. The next prime is 13693553. The reversal of 13693540 is 4539631.

It can be written as a sum of positive squares in 4 ways, for example, as 33124 + 13660416 = 182^2 + 3696^2 .

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 23 ways as a sum of consecutive naturals, for example, 87142 + ... + 87298.

It is an arithmetic number, because the mean of its divisors is an integer number (472815).

Almost surely, 2^13693540 is an apocalyptic number.

13693540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13693540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17021340).

13693540 is an abundant number, since it is smaller than the sum of its proper divisors (20349140).

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

13693540 is a wasteful number, since it uses less digits than its factorization.

13693540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 13693540 is about 3700.4783474573. The cubic root of 13693540 is about 239.2426356591.

The spelling of 13693540 in words is "thirteen million, six hundred ninety-three thousand, five hundred forty".