13140432 has 30 divisors (see below), whose sum is σ = 36775362. Its totient is φ = 4380096.

The previous prime is 13140427. The next prime is 13140433. The reversal of 13140432 is 23404131.

It can be written as a sum of positive squares in only one way, i.e., 13133376 + 7056 = 3624^2 + 84^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45483 + ... + 45770.

Almost surely, 2^13140432 is an apocalyptic number.

13140432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13140432 is an abundant number, since it is smaller than the sum of its proper divisors (23634930).

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

13140432 is a wasteful number, since it uses less digits than its factorization.

13140432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91267 (or 91258 counting only the distinct ones).

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

The square root of 13140432 is about 3624.9733792126. The cubic root of 13140432 is about 235.9771116364.

Adding to 13140432 its reverse (23404131), we get a palindrome (36544563).

The spelling of 13140432 in words is "thirteen million, one hundred forty thousand, four hundred thirty-two".