13415540 has 12 divisors (see below), whose sum is σ = 28172676. Its totient is φ = 5366208.

The previous prime is 13415537. The next prime is 13415551. The reversal of 13415540 is 4551431.

13415540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10679824 + 2735716 = 3268^2 + 1654^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335369 + ... + 335408.

It is an arithmetic number, because the mean of its divisors is an integer number (2347723).

Almost surely, 2^13415540 is an apocalyptic number.

13415540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13415540 is an abundant number, since it is smaller than the sum of its proper divisors (14757136).

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

13415540 is a wasteful number, since it uses less digits than its factorization.

13415540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670786 (or 670784 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 13415540 is about 3662.7230307518. The cubic root of 13415540 is about 237.6125560673.

Adding to 13415540 its reverse (4551431), we get a palindrome (17966971).

The spelling of 13415540 in words is "thirteen million, four hundred fifteen thousand, five hundred forty".