13440132 has 36 divisors (see below), whose sum is σ = 35973756. Its totient is φ = 4216320.

The previous prime is 13440121. The next prime is 13440173. The reversal of 13440132 is 23104431.

It can be written as a sum of positive squares in 2 ways, for example, as 10536516 + 2903616 = 3246^2 + 1704^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10369 + ... + 11592.

It is an arithmetic number, because the mean of its divisors is an integer number (999271).

Almost surely, 2^13440132 is an apocalyptic number.

13440132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13440132 is an abundant number, since it is smaller than the sum of its proper divisors (22533624).

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

13440132 is a wasteful number, since it uses less digits than its factorization.

13440132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21988 (or 21983 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13440132 is about 3666.0785588964. The cubic root of 13440132 is about 237.7576564787.

Adding to 13440132 its reverse (23104431), we get a palindrome (36544563).

The spelling of 13440132 in words is "thirteen million, four hundred forty thousand, one hundred thirty-two".