7487540 has 24 divisors (see below), whose sum is σ = 15786792. Its totient is φ = 2983040.

The previous prime is 7487507. The next prime is 7487549. The reversal of 7487540 is 457847.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 633616 + 6853924 = 796^2 + 2618^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7487540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7487549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5750 + ... + 6930.

It is an arithmetic number, because the mean of its divisors is an integer number (657783).

Almost surely, 2^7487540 is an apocalyptic number.

It is an amenable number.

7487540 is an abundant number, since it is smaller than the sum of its proper divisors (8299252).

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

7487540 is a wasteful number, since it uses less digits than its factorization.

7487540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507 (or 1505 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 7487540 is about 2736.3369675535. The cubic root of 7487540 is about 195.6349236393.

The spelling of 7487540 in words is "seven million, four hundred eighty-seven thousand, five hundred forty".