13424240 has 40 divisors (see below), whose sum is σ = 32224128. Its totient is φ = 5195520.

The previous prime is 13424231. The next prime is 13424263. The reversal of 13424240 is 4242431.

13424240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (20).

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, 227 + ... + 5186.

Almost surely, 2^13424240 is an apocalyptic number.

13424240 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 13424240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16112064).

13424240 is an abundant number, since it is smaller than the sum of its proper divisors (18799888).

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

13424240 is a wasteful number, since it uses less digits than its factorization.

13424240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5457 (or 5451 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 13424240 is about 3663.9104792557. The cubic root of 13424240 is about 237.6639090139.

Adding to 13424240 its reverse (4242431), we get a palindrome (17666671).

The spelling of 13424240 in words is "thirteen million, four hundred twenty-four thousand, two hundred forty".