7987305 has 32 divisors (see below), whose sum is σ = 13409280. Its totient is φ = 4055040.

The previous prime is 7987289. The next prime is 7987307. The reversal of 7987305 is 5037897.

It is not a de Polignac number, because 7987305 - 2⁴ = 7987289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7987307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41289 + ... + 41481.

It is an arithmetic number, because the mean of its divisors is an integer number (419040).

Almost surely, 2^7987305 is an apocalyptic number.

It is an amenable number.

7987305 is a deficient number, since it is larger than the sum of its proper divisors (5421975).

7987305 is a wasteful number, since it uses less digits than its factorization.

7987305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 7987305 is about 2826.1820535840. The cubic root of 7987305 is about 199.8941523246.

The spelling of 7987305 in words is "seven million, nine hundred eighty-seven thousand, three hundred five".