13662240 has 48 divisors (see below), whose sum is σ = 43037568. Its totient is φ = 3643136.

The previous prime is 13662221. The next prime is 13662247. The reversal of 13662240 is 4226631.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 13662240.

It is not an unprimeable number, because it can be changed into a prime (13662247) 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, 13752 + ... + 14711.

It is an arithmetic number, because the mean of its divisors is an integer number (896616).

Almost surely, 2^13662240 is an apocalyptic number.

13662240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13662240 is an abundant number, since it is smaller than the sum of its proper divisors (29375328).

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

13662240 is a wasteful number, since it uses less digits than its factorization.

13662240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28481 (or 28473 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 13662240 is about 3696.2467450104. The cubic root of 13662240 is about 239.0602136994.

Adding to 13662240 its reverse (4226631), we get a palindrome (17888871).

The spelling of 13662240 in words is "thirteen million, six hundred sixty-two thousand, two hundred forty".