78727085 has 16 divisors (see below), whose sum is σ = 100324656. Its totient is φ = 59102208.

The previous prime is 78727079. The next prime is 78727087. The reversal of 78727085 is 58072787.

It can be written as a sum of positive squares in 8 ways, for example, as 546121 + 78180964 = 739^2 + 8842^2 .

It is a cyclic number.

It is not a de Polignac number, because 78727085 - 2⁸ = 78726829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78727087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32579 + ... + 34911.

It is an arithmetic number, because the mean of its divisors is an integer number (6270291).

Almost surely, 2^78727085 is an apocalyptic number.

It is an amenable number.

78727085 is a deficient number, since it is larger than the sum of its proper divisors (21597571).

78727085 is a wasteful number, since it uses less digits than its factorization.

78727085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752.

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 78727085 is about 8872.8284667292. The cubic root of 78727085 is about 428.5893651488.

It can be divided in two parts, 787 and 27085, that added together give a palindrome (27872).

The spelling of 78727085 in words is "seventy-eight million, seven hundred twenty-seven thousand, eighty-five".