85109178 has 48 divisors (see below), whose sum is σ = 216018144. Its totient is φ = 22105440.

The previous prime is 85109173. The next prime is 85109183. The reversal of 85109178 is 87190158.

It is an interprime number because it is at equal distance from previous prime (85109173) and next prime (85109183).

It is not an unprimeable number, because it can be changed into a prime (85109173) 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 23 ways as a sum of consecutive naturals, for example, 9925 + ... + 16392.

It is an arithmetic number, because the mean of its divisors is an integer number (4500378).

Almost surely, 2^85109178 is an apocalyptic number.

85109178 is an abundant number, since it is smaller than the sum of its proper divisors (130908966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85109178 is a wasteful number, since it uses less digits than its factorization.

85109178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26347 (or 26340 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 85109178 is about 9225.4635655885. The cubic root of 85109178 is about 439.8711365057.

The spelling of 85109178 in words is "eighty-five million, one hundred nine thousand, one hundred seventy-eight".