7800085 has 8 divisors (see below), whose sum is σ = 9378360. Its totient is φ = 6227904.

The previous prime is 7800083. The next prime is 7800097. The reversal of 7800085 is 5800087.

It can be written as a sum of positive squares in 4 ways, for example, as 10404 + 7789681 = 102^2 + 2791^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7800085 - 2¹ = 7800083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7800083) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2071 + ... + 4459.

It is an arithmetic number, because the mean of its divisors is an integer number (1172295).

Almost surely, 2^7800085 is an apocalyptic number.

It is an amenable number.

7800085 is a deficient number, since it is larger than the sum of its proper divisors (1578275).

7800085 is a wasteful number, since it uses less digits than its factorization.

7800085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3047.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 7800085 is about 2792.8632261534. The cubic root of 7800085 is about 198.3199686559.

The spelling of 7800085 in words is "seven million, eight hundred thousand, eighty-five".