13433440 has 48 divisors (see below), whose sum is σ = 32060448. Its totient is φ = 5318656.

The previous prime is 13433429. The next prime is 13433443. The reversal of 13433440 is 4433431.

13433440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13433443) 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, 17709 + ... + 18451.

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

Almost surely, 2^13433440 is an apocalyptic number.

13433440 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 13433440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16030224).

13433440 is an abundant number, since it is smaller than the sum of its proper divisors (18627008).

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

13433440 is a wasteful number, since it uses less digits than its factorization.

13433440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 13433440 is about 3665.1657534142. The cubic root of 13433440 is about 237.7181891485.

Adding to 13433440 its reverse (4433431), we get a palindrome (17866871).

Subtracting from 13433440 its reverse (4433431), we obtain a palindrome (9000009).

The spelling of 13433440 in words is "thirteen million, four hundred thirty-three thousand, four hundred forty".