13401443240 has 16 divisors (see below), whose sum is σ = 30153247380. Its totient is φ = 5360577280.

The previous prime is 13401443233. The next prime is 13401443243. The reversal of 13401443240 is 4234410431.

It can be written as a sum of positive squares in 2 ways, for example, as 12832811524 + 568631716 = 113282^2 + 23846^2 .

It is not an unprimeable number, because it can be changed into a prime (13401443243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167518001 + ... + 167518080.

Almost surely, 2^13401443240 is an apocalyptic number.

13401443240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13401443240 is an abundant number, since it is smaller than the sum of its proper divisors (16751804140).

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

13401443240 is a wasteful number, since it uses less digits than its factorization.

13401443240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335036092 (or 335036088 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 13401443240 its reverse (4234410431), we get a palindrome (17635853671).

The spelling of 13401443240 in words is "thirteen billion, four hundred one million, four hundred forty-three thousand, two hundred forty".