85105778 has 8 divisors (see below), whose sum is σ = 132060780. Its totient is φ = 41085520.

The previous prime is 85105777. The next prime is 85105781. The reversal of 85105778 is 87750158.

It can be written as a sum of positive squares in 2 ways, for example, as 83302129 + 1803649 = 9127^2 + 1343^2 .

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 (85105777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733613 + ... + 733728.

Almost surely, 2^85105778 is an apocalyptic number.

85105778 is a deficient number, since it is larger than the sum of its proper divisors (46955002).

85105778 is a wasteful number, since it uses less digits than its factorization.

85105778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467372.

The product of its (nonzero) digits is 78400, while the sum is 41.

The square root of 85105778 is about 9225.2792911651. The cubic root of 85105778 is about 439.8652790027.

The spelling of 85105778 in words is "eighty-five million, one hundred five thousand, seven hundred seventy-eight".