7140240 has 120 divisors (see below), whose sum is σ = 24605568. Its totient is φ = 1854720.

The previous prime is 7140227. The next prime is 7140247. The reversal of 7140240 is 420417.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (7140247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33735 + ... + 33945.

Almost surely, 2^7140240 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 7140240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12302784).

7140240 is an abundant number, since it is smaller than the sum of its proper divisors (17465328).

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

7140240 is a wasteful number, since it uses less digits than its factorization.

7140240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 7140240 is about 2672.1227516714. The cubic root of 7140240 is about 192.5621545512.

Adding to 7140240 its reverse (420417), we get a palindrome (7560657).

The spelling of 7140240 in words is "seven million, one hundred forty thousand, two hundred forty".