13001003440 has 40 divisors (see below), whose sum is σ = 30408366240. Its totient is φ = 5169255936.

The previous prime is 13001003413. The next prime is 13001003443. The reversal of 13001003440 is 4430010031.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (13001003443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473205 + ... + 499924.

It is an arithmetic number, because the mean of its divisors is an integer number (760209156).

Almost surely, 2^13001003440 is an apocalyptic number.

13001003440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13001003440 is an abundant number, since it is smaller than the sum of its proper divisors (17407362800).

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

13001003440 is a wasteful number, since it uses less digits than its factorization.

13001003440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973309 (or 973303 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 13001003440 its reverse (4430010031), we get a palindrome (17431013471).

The spelling of 13001003440 in words is "thirteen billion, one million, three thousand, four hundred forty".