7040520 has 160 divisors (see below), whose sum is σ = 24698520. Its totient is φ = 1797120.

The previous prime is 7040513. The next prime is 7040521. The reversal of 7040520 is 250407.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4588164 + 2452356 = 2142^2 + 1566^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 7040493 and 7040502.

It is not an unprimeable number, because it can be changed into a prime (7040521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 132814 + ... + 132866.

Almost surely, 2^7040520 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 7040520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12349260).

7040520 is an abundant number, since it is smaller than the sum of its proper divisors (17658000).

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

7040520 is a wasteful number, since it uses less digits than its factorization.

7040520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 7040520 is about 2653.3978216619. The cubic root of 7040520 is about 191.6615129889.

Adding to 7040520 its reverse (250407), we get a palindrome (7290927).

The spelling of 7040520 in words is "seven million, forty thousand, five hundred twenty".