13130323440 has 80 divisors (see below), whose sum is σ = 43835090208. Its totient is φ = 3232078848.

The previous prime is 13130323433. The next prime is 13130323457. The reversal of 13130323440 is 4432303131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 13130323440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2101099 + ... + 2107338.

Almost surely, 2^13130323440 is an apocalyptic number.

13130323440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13130323440 is an abundant number, since it is smaller than the sum of its proper divisors (30704766768).

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

13130323440 is a wasteful number, since it uses less digits than its factorization.

13130323440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208466 (or 4208460 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 13130323440 its reverse (4432303131), we get a palindrome (17562626571).

The spelling of 13130323440 in words is "thirteen billion, one hundred thirty million, three hundred twenty-three thousand, four hundred forty".