7489540 has 48 divisors (see below), whose sum is σ = 16758000. Its totient is φ = 2806272.

The previous prime is 7489529. The next prime is 7489541. The reversal of 7489540 is 459847.

It can be written as a sum of positive squares in 8 ways, for example, as 614656 + 6874884 = 784^2 + 2622^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 7489540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7489541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21286 + ... + 21634.

It is an arithmetic number, because the mean of its divisors is an integer number (349125).

Almost surely, 2^7489540 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 7489540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8379000).

7489540 is an abundant number, since it is smaller than the sum of its proper divisors (9268460).

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

7489540 is a wasteful number, since it uses less digits than its factorization.

7489540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 7489540 is about 2736.7023952195. The cubic root of 7489540 is about 195.6523407979.

The spelling of 7489540 in words is "seven million, four hundred eighty-nine thousand, five hundred forty".