13440140 has 24 divisors (see below), whose sum is σ = 32256672. Its totient is φ = 4608000.

The previous prime is 13440121. The next prime is 13440173. The reversal of 13440140 is 4104431.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47861 + ... + 48140.

It is an arithmetic number, because the mean of its divisors is an integer number (1344028).

Almost surely, 2^13440140 is an apocalyptic number.

13440140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13440140 is an abundant number, since it is smaller than the sum of its proper divisors (18816532).

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

13440140 is a wasteful number, since it uses less digits than its factorization.

13440140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96017 (or 96015 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 13440140 is about 3666.0796499803. The cubic root of 13440140 is about 237.7577036524.

Adding to 13440140 its reverse (4104431), we get a palindrome (17544571).

The spelling of 13440140 in words is "thirteen million, four hundred forty thousand, one hundred forty".