7982540 has 24 divisors (see below), whose sum is σ = 17342640. Its totient is φ = 3082688.

The previous prime is 7982539. The next prime is 7982543. The reversal of 7982540 is 452897.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7982540.

It is not an unprimeable number, because it can be changed into a prime (7982543) 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, 6302 + ... + 7461.

It is an arithmetic number, because the mean of its divisors is an integer number (722610).

Almost surely, 2^7982540 is an apocalyptic number.

It is an amenable number.

7982540 is an abundant number, since it is smaller than the sum of its proper divisors (9360100).

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

7982540 is a wasteful number, since it uses less digits than its factorization.

7982540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13801 (or 13799 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 7982540 is about 2825.3389177230. The cubic root of 7982540 is about 199.8543940202.

The spelling of 7982540 in words is "seven million, nine hundred eighty-two thousand, five hundred forty".