13001440 has 48 divisors (see below), whose sum is σ = 32060448. Its totient is φ = 4973056.

The previous prime is 13001407. The next prime is 13001459. The reversal of 13001440 is 4410031.

It is a self number, because there is not a number n which added to its sum of digits gives 13001440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1914 + ... + 5446.

It is an arithmetic number, because the mean of its divisors is an integer number (667926).

Almost surely, 2^13001440 is an apocalyptic number.

13001440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13001440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16030224).

13001440 is an abundant number, since it is smaller than the sum of its proper divisors (19059008).

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

13001440 is a wasteful number, since it uses less digits than its factorization.

13001440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571 (or 3563 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 13001440 is about 3605.7509620050. The cubic root of 13001440 is about 235.1421503027.

Adding to 13001440 its reverse (4410031), we get a palindrome (17411471).

The spelling of 13001440 in words is "thirteen million, one thousand, four hundred forty".