7839985 has 8 divisors (see below), whose sum is σ = 9446976. Its totient is φ = 6246000.

The previous prime is 7839961. The next prime is 7840013. The reversal of 7839985 is 5899387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7839985 - 2⁷ = 7839857 is a prime.

It is a super-2 number, since 2×7839985² = 122930729600450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1869 + ... + 4378.

It is an arithmetic number, because the mean of its divisors is an integer number (1180872).

Almost surely, 2^7839985 is an apocalyptic number.

It is an amenable number.

7839985 is a deficient number, since it is larger than the sum of its proper divisors (1606991).

7839985 is a wasteful number, since it uses less digits than its factorization.

7839985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6503.

The product of its digits is 544320, while the sum is 49.

The square root of 7839985 is about 2799.9973214273. The cubic root of 7839985 is about 198.6575509808.

The spelling of 7839985 in words is "seven million, eight hundred thirty-nine thousand, nine hundred eighty-five".