85305778 has 16 divisors (see below), whose sum is σ = 129389400. Its totient is φ = 42178816.

The previous prime is 85305761. The next prime is 85305809. The reversal of 85305778 is 87750358.

It can be written as a sum of positive squares in 4 ways, for example, as 84879369 + 426409 = 9213^2 + 653^2 .

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, 86826 + ... + 87802.

Almost surely, 2^85305778 is an apocalyptic number.

85305778 is a deficient number, since it is larger than the sum of its proper divisors (44083622).

85305778 is a wasteful number, since it uses less digits than its factorization.

85305778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 85305778 is about 9236.1127104426. The cubic root of 85305778 is about 440.2095730290.

The spelling of 85305778 in words is "eighty-five million, three hundred five thousand, seven hundred seventy-eight".