7439985 has 32 divisors (see below), whose sum is σ = 15118080. Its totient is φ = 3400704.

The previous prime is 7439977. The next prime is 7440011. The reversal of 7439985 is 5899347.

It is not a de Polignac number, because 7439985 - 2³ = 7439977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

7439985 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7439985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2992 + ... + 4881.

It is an arithmetic number, because the mean of its divisors is an integer number (472440).

Almost surely, 2^7439985 is an apocalyptic number.

It is an amenable number.

7439985 is an abundant number, since it is smaller than the sum of its proper divisors (7678095).

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

7439985 is a wasteful number, since it uses less digits than its factorization.

7439985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7894 (or 7888 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 7439985 is about 2727.6335897624. The cubic root of 7439985 is about 195.2198703374.

The spelling of 7439985 in words is "seven million, four hundred thirty-nine thousand, nine hundred eighty-five".