13240289736 has 96 divisors (see below), whose sum is σ = 37237538520. Its totient is φ = 4246732800.

The previous prime is 13240289723. The next prime is 13240289743. The reversal of 13240289736 is 63798204231.

13240289736 is a `hidden beast` number, since 132 + 402 + 89 + 7 + 36 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7991287236 + 5249002500 = 89394^2 + 72450^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13240289691 and 13240289700.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184776 + ... + 246216.

Almost surely, 2^13240289736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13240289736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18618769260).

13240289736 is an abundant number, since it is smaller than the sum of its proper divisors (23997248784).

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

13240289736 is a wasteful number, since it uses less digits than its factorization.

13240289736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61567 (or 61560 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 13240289736 in words is "thirteen billion, two hundred forty million, two hundred eighty-nine thousand, seven hundred thirty-six".