7959985 has 24 divisors (see below), whose sum is σ = 10725120. Its totient is φ = 5665440.

The previous prime is 7959983. The next prime is 7959997. The reversal of 7959985 is 5899597.

It is not a de Polignac number, because 7959985 - 2¹ = 7959983 is a prime.

It is a super-2 number, since 2×7959985² = 126722722400450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7959983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35584 + ... + 35806.

It is an arithmetic number, because the mean of its divisors is an integer number (446880).

Almost surely, 2^7959985 is an apocalyptic number.

It is an amenable number.

7959985 is a deficient number, since it is larger than the sum of its proper divisors (2765135).

7959985 is a wasteful number, since it uses less digits than its factorization.

7959985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 298 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 52.

The square root of 7959985 is about 2821.3445376274. The cubic root of 7959985 is about 199.6659841442.

The spelling of 7959985 in words is "seven million, nine hundred fifty-nine thousand, nine hundred eighty-five".