13333440 has 224 divisors, whose sum is σ = 48280320. Its totient is φ = 3096576.

The previous prime is 13333433. The next prime is 13333499. The reversal of 13333440 is 4433331.

13333440 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 an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310059 + ... + 310101.

Almost surely, 2^13333440 is an apocalyptic number.

13333440 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 13333440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24140160).

13333440 is an abundant number, since it is smaller than the sum of its proper divisors (34946880).

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

13333440 is a wasteful number, since it uses less digits than its factorization.

13333440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 13333440 is about 3651.4983226068. The cubic root of 13333440 is about 237.1268526342.

Adding to 13333440 its reverse (4433331), we get a palindrome (17766771).

The spelling of 13333440 in words is "thirteen million, three hundred thirty-three thousand, four hundred forty".