13617040 has 20 divisors (see below), whose sum is σ = 31659804. Its totient is φ = 5446784.

The previous prime is 13617031. The next prime is 13617041. The reversal of 13617040 is 4071631.

It can be written as a sum of positive squares in 2 ways, for example, as 3041536 + 10575504 = 1744^2 + 3252^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (13617041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85027 + ... + 85186.

Almost surely, 2^13617040 is an apocalyptic number.

13617040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13617040 is an abundant number, since it is smaller than the sum of its proper divisors (18042764).

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

13617040 is a wasteful number, since it uses less digits than its factorization.

13617040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170226 (or 170220 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 13617040 is about 3690.1273690755. The cubic root of 13617040 is about 238.7962877278.

Adding to 13617040 its reverse (4071631), we get a palindrome (17688671).

The spelling of 13617040 in words is "thirteen million, six hundred seventeen thousand, forty".