7853985 has 12 divisors (see below), whose sum is σ = 13613652. Its totient is φ = 4188768.

The previous prime is 7853977. The next prime is 7853987. The reversal of 7853985 is 5893587.

It can be written as a sum of positive squares in 2 ways, for example, as 4028049 + 3825936 = 2007^2 + 1956^2 .

It is not a de Polignac number, because 7853985 - 2³ = 7853977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 174533 = 7853985 / (7 + 8 + 5 + 3 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 7853985.

It is not an unprimeable number, because it can be changed into a prime (7853987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87222 + ... + 87311.

It is an arithmetic number, because the mean of its divisors is an integer number (1134471).

Almost surely, 2^7853985 is an apocalyptic number.

It is an amenable number.

7853985 is a deficient number, since it is larger than the sum of its proper divisors (5759667).

7853985 is a wasteful number, since it uses less digits than its factorization.

7853985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174544 (or 174541 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 7853985 is about 2802.4962087396. The cubic root of 7853985 is about 198.7757294328.

The spelling of 7853985 in words is "seven million, eight hundred fifty-three thousand, nine hundred eighty-five".