78500085 has 16 divisors (see below), whose sum is σ = 127370880. Its totient is φ = 41276480.

The previous prime is 78500057. The next prime is 78500089. The reversal of 78500085 is 58000587.

It is not a de Polignac number, because 78500085 - 2⁵ = 78500053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78500089) 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, 35790 + ... + 37919.

It is an arithmetic number, because the mean of its divisors is an integer number (7960680).

Almost surely, 2^78500085 is an apocalyptic number.

It is an amenable number.

78500085 is a deficient number, since it is larger than the sum of its proper divisors (48870795).

78500085 is a wasteful number, since it uses less digits than its factorization.

78500085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73788.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 78500085 is about 8860.0273701609. The cubic root of 78500085 is about 428.1770401159.

It can be divided in two parts, 7 and 8500085, that multiplied together give a palindrome (59500595).

The spelling of 78500085 in words is "seventy-eight million, five hundred thousand, eighty-five".