85386778 has 8 divisors (see below), whose sum is σ = 129519540. Its totient is φ = 42213600.

The previous prime is 85386773. The next prime is 85386793. The reversal of 85386778 is 87768358.

It can be written as a sum of positive squares in 2 ways, for example, as 63792169 + 21594609 = 7987^2 + 4647^2 .

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

It is not an unprimeable number, because it can be changed into a prime (85386773) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 239673 + ... + 240028.

Almost surely, 2^85386778 is an apocalyptic number.

85386778 is a deficient number, since it is larger than the sum of its proper divisors (44132762).

85386778 is a wasteful number, since it uses less digits than its factorization.

85386778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479792.

The product of its digits is 2257920, while the sum is 52.

The square root of 85386778 is about 9240.4966316752. The cubic root of 85386778 is about 440.3488590050.

The spelling of 85386778 in words is "eighty-five million, three hundred eighty-six thousand, seven hundred seventy-eight".