7424240 has 80 divisors (see below), whose sum is σ = 18802368. Its totient is φ = 2715648.

The previous prime is 7424233. The next prime is 7424243. The reversal of 7424240 is 424247.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7424243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72029 + ... + 72131.

Almost surely, 2^7424240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7424240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9401184).

7424240 is an abundant number, since it is smaller than the sum of its proper divisors (11378128).

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

7424240 is a wasteful number, since it uses less digits than its factorization.

7424240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 7424240 is about 2724.7458597088. The cubic root of 7424240 is about 195.0820605750.

Adding to 7424240 its reverse (424247), we get a palindrome (7848487).

The spelling of 7424240 in words is "seven million, four hundred twenty-four thousand, two hundred forty".