13436540 has 24 divisors (see below), whose sum is σ = 30387840. Its totient is φ = 4961088.

The previous prime is 13436519. The next prime is 13436543. The reversal of 13436540 is 4563431.

13436540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13436543) 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, 25580 + ... + 26099.

It is an arithmetic number, because the mean of its divisors is an integer number (1266160).

Almost surely, 2^13436540 is an apocalyptic number.

13436540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13436540 is an abundant number, since it is smaller than the sum of its proper divisors (16951300).

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

13436540 is a wasteful number, since it uses less digits than its factorization.

13436540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51701 (or 51699 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 13436540 is about 3665.5886294018. The cubic root of 13436540 is about 237.7364736115.

Adding to 13436540 its reverse (4563431), we get a palindrome (17999971).

The spelling of 13436540 in words is "thirteen million, four hundred thirty-six thousand, five hundred forty".