7640985 has 16 divisors (see below), whose sum is σ = 13337280. Its totient is φ = 3704640.

The previous prime is 7640933. The next prime is 7640987. The reversal of 7640985 is 5890467.

It is not a de Polignac number, because 7640985 - 2¹¹ = 7638937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7640987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22990 + ... + 23319.

It is an arithmetic number, because the mean of its divisors is an integer number (833580).

Almost surely, 2^7640985 is an apocalyptic number.

It is an amenable number.

7640985 is a deficient number, since it is larger than the sum of its proper divisors (5696295).

7640985 is a wasteful number, since it uses less digits than its factorization.

7640985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46328.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 7640985 is about 2764.2331667209. The cubic root of 7640985 is about 196.9623039351.

The spelling of 7640985 in words is "seven million, six hundred forty thousand, nine hundred eighty-five".